12-디클로로벤젠-UL-14C

Excerpt from ERG Guide 152 [Substances - Toxic (Combustible)]:

Use water spray, powder, foam, carbon dioxide.

Fresh air, rest. Refer for medical attention.

Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention .

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer for medical attention .

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

General First Aid:

(General first aid procedures)

· Wear positive pressure self-contained breathing apparatus (SCBA).

182.0 [ppm]

10.0 [ppm]

Approach fire from upwind to avoid hazardous vapors and toxic decomposition products. Use water spray, dry chemical, foam, or carbon dioxide. Use water spray to keep fire-exposed containers cool. Extinguish fire using agent suitable for surrounding fire.

Wear full protective clothing and positive pressure self-contained breathing apparatus.

If material on fire or involved in fire: Extinguish fire using agent suitable for type of surrounding fire (Material itself does not burn or burns with difficulty.). Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide.

Land spill: Dig a pit, pond, lagoon, or holding area to contain liquid or solid material. /SRP: If time permits, pits, ponds, lagoons, soak holes or holding areas should be sealed with an impermeable flexible membrane liner./ Dike surface flow using soil, sand bags, foamed polyurethane, or concrete. Absorb bulk liquid with fly ash, or cement power. Apply "universal" gelling agent to immobilize spill.

Water spill: Use natural deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. If dissolved in region of 10 ppm or greater concn apply activated carbon at 10 times the spilled amount. Remove trapped material with suction hoses. Use mechanical drifts or lifts to remove immobilized masses of pollutants and precipitates.

1. Remove all ignition sources. 2. Ventilate area of spill or leak. 3. For small quantities, absorb on paper towels. Evaporate in a safe place (such as a fume hood). Allow sufficient time for evaporating vapors to completely clear the hood ductwork. Burn the paper in a suitable location away from combustible materials. Large quantities can be reclaimed or collected and atomized in a suitable combustion chamber equipped with an appropriate effluent gas cleaning device.

Approach release from upwind. Stop or control the leak, if this can be done without undue risk. Control runoff and isolate discharged material for proper disposal.

For more Cleanup Methods (Complete) data for 1,2-DICHLOROBENZENE (6 total), please visit the HSDB record page.

Generators of waste (equal to or greater than 100 kg/month) containing this contaminant, EPA hazardous waste number U070 & F002, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste.

... Halogenated compounds may be disposed of by incineration provided they are blended with other compatible wastes or fuels so that the composite contains less than 30% halogens and the heating value is from 7000 to 9000 BTU/1b. Liquid injection, rotary kiln, and fluidized bed incinerators are typically used to destroy liquid halogenated wastes. ... Temperatures of at least 2000 - 2200 °F and residence times /of more than 2 sec/ ... are required for the destruction of halogenated aromatic hydrocarbons.

Potential candidate for rotary kiln incineration, with a temperature range of 820 to 1,600 °C, and a residence time of seconds. Also a potential candidate for liquid injection incineration, with a temperature range of 650 to 1,600 °C, and a residence time of 0.1 to 2 seconds.

Chemical Treatability of 1,2-Dichlorobenzene; Concentration Process: Stripping; Chemical Classification: Aromatic; Scale of Study: Full Scale, Continuous Flow; Type of Wastewater Used: Domestic Wastewater; Results of Study: 70% reduction by air stripping.

Dichlorobenzene was detected in whole blood (3.12 ng/g) and adipose tissue (2.28 ng/g) from the general population of Canada(1). 1,2-Dichlorobenzene was detected in the personal air of Los Angeles, CA residents at concns of 0.3-0.4 ug/cu m and residents of Contra Costa, CA at concns of 0.6 ug/cu m(2). 1,2-Dichlorobenzene was detected in the breath of Los Angeles, CA residents at concns of 0.04-0.1 ug/cu m and residents of Contra Costa, CA at concns of 0.08 ug/cu m(2).

Following oral exposure, administer charcoal as a slurry; administer oxygen to all cyanotic or symptomatic patients. In case of methemoglobinemia, administer 1 to 2 mg/kg of 1% methylene blue slowly IV in symptomatic patients; also consider adjunctive therapy. In case of inhalation exposure, move patient to fresh air; monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with inhaled beta2 agonist and oral or parenteral corticosteroids. Following eye exposure, irrigate exposed eyes with copious amounts of room temperature water for at least 15 minutes. Following dermal exposure, skin should be thoroughly washed with soap and water; contaminated clothing and shoes should be discarded. Administer 100 percent humidified supplemental oxygen with assisted ventilation as required. Treat for methemoglobinemia and sequelae. Signs and symptoms of methemoglobinemia may be delayed. (T36)

Effect of 1,2-DCB on sulfur metabolism as measured in the urine was studied in 5 dogs given 50 mg/kg bw or 250 mg/kg bw 1,2-DCB. ...Urinary output of sulfur was increased in 1,2-DCB dosed animals compared to controls.

The hepatic toxicity of ortho-dichlorobenzene was studied in Fischer 344 rats given methyl palmitate in order to inhibit Kupffer-cell function or superoxide dismutase (conjugated to polyethylene glycol) to scavenge superoxide anions. Administration of either compound dramatically reduced the severity of ortho-dichlorobenzene-induced liver injury, and both agents reduced the increase in plasma alanine aminotransferase activity by 80%; light microscopic examination confirmed that the reductions in enzyme activity reflected protection from hepatocellular injury. Interestingly, methyl palmitate did not protect against ortho-dichlorobenzene-induced hepatotoxicity in phenobarbital-pretreated rats, and the degree of inhibition of hepatotoxicity by polyethylene glycol-superoxide dismutase was not significantly different from that in normal rats. The lack of significant inhibition of phenobarbital-potentiated hepatotoxicity by both polyethylene glycol-superoxide dismutase and methyl palmitate suggests that reactive oxygen species released from a non-parenchymal source are not as crucial to the hepatotoxicity of ortho-dichlorobenzene in phenobarbital-pretreated as in the normal rats. The results suggest that reactive oxygen species released from Kupffer cells play a major role in the progression of orthodichlorobenzene hepatotoxicity.

Inhaling the vapor or dusts of 1,2-DCB at very high concentrations could be very irritating to eyes and nose and cause burning and tearing of the eyes, coughing, difficult breathing, and an upset stomach. Ingestion of 1,2-DCB can cause effects in the kidneys and blood, and that 1,3-DCB caused thyroid and pituitary effects. (L395)

EC50; Species: Cyclotella meneghiniana (Diatom, exponential growth phase); Conditions: static, 15 °C; Concentration: 23330 ug/L for 48 hr; Effect: percent DNA reduction

EC50; Species: Pseudokirchneriella subcapitata (Green algae, initial concentration 500,000 cells/L); Conditions: static, 20 °C; Concentration: 2200 ug/L for 96 hr; Effect: general growth

EC50; Species: Scenedesmus subspicatus (Green algae, log growth phase); Conditions: static, 24 °C, pH 8.0-9.3; Concentration: 14000 ug/L for 48 hr; Effect: decreased population biomass

EC50; Species: Scenedesmus subspicatus (Green algae, log growth phase); Conditions: static, 24 °C, pH 8.0-9.3; Concentration: 13500 ug/L for 48 hr; Effect: general population changes

For more Ecotoxicity Values (Complete) data for 1,2-DICHLOROBENZENE (36 total), please visit the HSDB record page.

TERRESTRIAL FATE: Based on a recommended classification scheme(1), Koc values of 280(2) and 320(3) measured in soil, indicates that 1,2-dichlorobenzene is expected to have moderate mobility in soil(SRC). Volatilization of 1,2-dichlorobenzene is expected from moist soil surfaces given its Henry's Law constant of 1.5X10-3 atm-cu m/mole at 20 °C(4). Volatilization of 1,2-dichlorobenzene from dry soil surfaces is expected based on a vapor pressure of 1.4 mm Hg at 25 °C(5). The volatilization half-life of 1,2-dichlorobenzene from Captina and McLaurin sandy loam soils was measured as about 4 days(6). 1,2-Dichlorobenzene at 100 mg/L achieved 0% of its theoretical BOD using an activated sludge inoculum at 30 mg/L in the Japanese MITI test(7), suggesting that biodegradation is expected to be slow in soil(SRC). 1,2-Dichlorobenzene is resistant to biodegradation in soils, with half-lives expected to be greater than 9 months(8).

AQUATIC FATE: Based on a recommended classification scheme(1), log Koc values of 3.7(2) and 4.3(3) measured in sediment indicate that 1,2-dichlorobenzene is expected to adsorb to suspended solids and sediment in water(SRC). 1,2-Dichlorobenzene is expected to volatilize from water surfaces(4) given its Henry's Law constant of 1.5X10-3 atm-cu m/mole at 20 °C(5). Using this Henry's Law constant and an estimation method(4), estimated volatilization half-lives for a model river and model lake are 4 and 120 hours, respectively(SRC). According to a classification scheme(6), BCF values in the range of 90 to 560, measured in carp(7) and trout(8), suggest that bioconcentration in aquatic organisms is moderate to high. 1,2-Dichlorobenzene at 100 mg/L achieved 0% of its theoretical BOD using an activated sludge inoculum at 30 mg/L in the Japanese MITI test(7), suggesting that biodegradation is expected to be slow in water under aerobic conditions(SRC). The biodegradation half-life of 1,2-dichlorobenzene in an acclimated anaerobic sediment slurry obtained from the Tsurumi River, Japan was 37 days(9).

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), 1,2-dichlorobenzene, which has a vapor pressure of 1.4 mm Hg at 25 °C(2), is expected to exist in the vapor phase in the ambient atmosphere. Vapor-phase 1,2-dichlorobenzene is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be about 38 days(SRC), calculated from its rate constant of 4.2X10-13 cu cm/molecule-sec (3). 1,2-Dichlorobenzene does not contain chromophores that absorb at wavelengths >290 nm and therefore is not expected to undergo direct photolysis by sunlight(4).

1,2-Dichlorobenzene was detected at a concn of 1.0 ng/g in market meat samples in Yugoslavia(1) and in 45 of 234 table ready foods in the US at an avg concn of 9.47 ppb(2). 1,2-Dichlorobenzene was detected in high-fat foods at concns of 49-113 ng/g and in low-fat foods at 11-78 ng/g(3). 1,2-Dichlorobenzene was detected in potato core at a concn of 0.328 ug/kg and pea seeds at a concn of 0.112 ug/kg(4).

The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

inhalation, skin absorption, ingestion, skin and/or eye contact

Inhalation (L554) ; oral (L554) ; dermal (L554)

Mean 1,2-dichlorobenzene of 13 ug/kg (fat basis) detected in Yugoslavian human adipose tissue and 9 ug/kg (as is basis) or 230 ug/kg (fat basis) in human milk.

A survey of human milk from the general population of Canada found 1,2-dichlorobenzene residues in 17 percent of the samples at an avg concn of 2 ppb(1). 1,2-Dichlorobenzene was detected in human milk at 9 ug/kg(2). 1,2-Dichlorobenzene was detected at average concns of 0.04, 0.05 and 0.04 ng/mL in whole milk, 2% milk, and 1% milk, respectively(3).

Gas chromatographic and mass spectral identification of 1,2-DCB was confirmed in cow milk fat; its origin may be from pesticides.

... 1,2-Dichlorobenzene has been shown to cause eye and respiratory irritation in humans at exposure levels above 100 ppm. Skin irritation has been observed following dermal application in humans and animals. 1,2-Dichlorobenzene is absorbed via the oral route. Absorption via the dermal or inhalation routes is poorly characterized. Inhalation is expected to be the major route for human exposure. The available toxicological data indicate that metabolic profiles and effects from 1,2-dichlorobenzene exposure are similar in rats, mice and humans. Animal studies with rats and mice have shown 1,2-dichlorobenzene to induce acute hepatotoxic effects. The LD50 for a single oral exposure to 1,2-dichlorobenzene for the rat ranges from 1516 to 2138 mg/kg bw. The LC100 for the rat is </= 977 ppm (5.9 mg/L) for a 10 hour exposure. During a 4 hour exposure, 1 of 20 rats died at 941 ppm (5.6 mg/L). In humans, the acute effects of 1,2-dichlorobenzene by ingestion or inhalation are reported to be headache, nausea, vomiting, vertigo, malaise and unconsciousness. Several oral studies of rats and mice ranging from 10 days to 2 years duration indicate that the adverse effects include increases in liver and kidney weights and hepatotoxicity. From these repeat dose studies, the NOAEL for non-neoplastic effects was 60 mg/kg bw, while the LOAEL was 120 mg/kg bw due to increased renal tubular regeneration in male mice. In several microbial organisms and mammalian systems, 1,2-dichlorobenzene tested negative in vitro. However, it did induce sister chromatid exchanges in Chinese Hamster ovary cells and increased mutation frequency in mouse lymphoma cells, both in the presence of metabolic activation. 1,2-dichlorobenzene was negative in several in vivo mammalian tests, except one of two micronuclei assays in mouse bone marrow was positive. In a two-year oral study in rats and mice, 1,2-dichlorobenzene was considered not to be carcinogenic (maximum dose of 120 mg/kg bw). In an inhalation 2-generation reproduction study in rats, no fertility effects were observed and reduced pup weight during lactation occurred at doses toxic to adults. The NOAEL and LOAEL (kidney and liver effects) for adult rats were 50 (0.3 mg/L) and 150 ppm (0.6 mg/L) respectively. In developmental studies in rats and rabbits, developmental effects were only seen in rats at maternally toxic doses (400 ppm, 2.4 mg/L). No human epidemiological studies have been conducted. ... 1,2-Dichlorobenzene has been tested on a wide range of aquatic organisms under acute exposure, although chronic data are scarce. Results for fish ranged from 96 hr LC50=1.58 mg/L for rainbow trout to 57 mg/L for fathead minnow. Both acute and chronic toxicity to aquatic invertebrates were obtained with two results showing high acute toxicity, namely EC50's of 0.78 mg/L and 0.66 mg/L to Daphnia and Ceriodaphnia respectively. Results from exposure to algae showed EC50 values in the 1-100 mg/L range for 1,2-dichlorobenzene. Toxicity to microorganisms can be considered slight. Although the major compartment expected to be exposed to 1,2-dichlorobenzene is the atmosphere, there are no ecotoxicity results available for organisms exposed through the gas phase. The chlorine substituents on the chemical suggest a potential for effects on stratospheric ozone. However, the chemical is unlikely to persist long enough to escape the troposphere, although it may persist long enough to undergo long range atmospheric transport. While there are a large number of acute data covering all trophic levels, chronic data are scarce. Therefore, an assessment factor of 100 has been chosen. The result used for determining the PNEC was the lowest chronic value obtained, i.e. 21 d NOEC = 0.63 mg/L for Daphnia magna. The PNECaquatic was therefore determined to be 6.3 ug/L.

F002; When 1,2-dichlorobenzene is a spent solvent, it is classified as a hazardous waste from a nonspecific source (F002), as stated in 40 CFR 261.31, and must be managed according to state and/or federal hazardous waste regulations.

U070; As stipulated in 40 CFR 261.33, when 1,2-dichlorobenzene, as a commercial chemical product or manufacturing chemical intermediate or an off-specification commercial chemical product or a manufacturing chemical intermediate, becomes a waste, it must be managed according to Federal and/or State hazardous waste regulations. Also defined as a hazardous waste is any residue, contaminated soil, water, or other debris resulting from the cleanup of a spill, into water or on dry land, of this waste. Generators of small quantities of this waste may qualify for partial exclusion from hazardous waste regulations (40 CFR 261.5).

Pursuant to section 8(d) of TSCA, EPA promulagated a model Health and Safety Data Reporting Rule. The section 8(d) model rule requires manufacturers, importers, and processors of listed chemical substances and mixtures to submit to EPA copies and lists of unpublished health and safety studies. 1,2-Dichlorobenzene is included on this list. Effective date 10/4/82; Sunset date 10/4/92.

Section 8(a) of TSCA requires manufacturers of this chemical substance to report preliminary assessment information concerned with production, exposure, and use to EPA as cited in the preamble in 51 FR 41329. Effective date 8/4/95; Reporting date 10/3/95.

All persons who manufacture (including import or manufacture as a byproduct) or process or intend to manufacture or process one or more of the substances in paragraph c of this section, other than as an impurity, after July 29, 1988, to the end of the reimbursement period shall submit letters of intent to conduct testing, submit study plans, conduct tests, and submit data, or submit exemption applications for those substances they manufacture or process, or intend to manufacture or process, as specified in this section, subpart A of this part, and parts 790 and 792 of this chapter for single-phase rulemaking. 1,2-Dichlorobenzene is included on this list. Required testing: hydrolysis.

As the federal pesticide law FIFRA directs, EPA is conducting a comprehensive review of older pesticides to consider their health and environmental effects and make decisions about their future use. Under this pesticide reregistration program, EPA examines health and safety data for pesticide active ingredients initially registered before November 1, 1984, and determines whether they are eligible for reregistration. In addition, all pesticides must meet the new safety standard of the Food Quality Protection Act of 1996. Pesticides for which EPA had not issued Registration Standards prior to the effective date of FIFRA, as amended in 1988, were divided into three lists based upon their potential for human exposure and other factors, with List B containing pesticides of greater concern and List D pesticides of less concern. 1,2-Dichlorobenzene is found on List C. Case No: 3057; Pesticide type: Antimicrobial; Case Status: No products containing the pesticide are actively registered ... The case /is characterized/ as "cancelled." Under FIFRA, pesticide producers may voluntarily cancel their registered products. EPA also may cancel pesticide registrations if registrants fail to pay required fees or make/meet certain reregistration commitments, or if EPA reaches findings of unreasonable adverse effects.; Active ingredient (AI): 1,2-Dichlorobenzene; AI Status: The active ingredient is no longer contained in any registered pesticide products ... "cancelled."

This action promulgates standards of performance for equipment leaks of Volatile Organic Compounds (VOC) in the Synthetic Organic Chemical Manufacturing Industry (SOCMI). The intended effect of these standards is to require all newly constructed, modified, and reconstructed SOCMI process units to use the best demonstrated system of continuous emission reduction for equipment leaks of VOC, considering costs, non air quality health and environmental impact and energy requirements. o-Dichlorobenzene is produced, as an intermediate or a final product, by process units covered under this subpart.

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 100 lb or 45.4 kg. The toll free number of the NRC is (800) 424-8802. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b).

o-Dichlorobenzene is designated as a hazardous substance under section 311(b)(2)(A) of the Federal Water Pollution Control Act and further regulated by the Clean Water Act Amendments of 1977 and 1978. These regulations apply to discharges of this substance. This designation includes any isomers and hydrates, as well as any solutions and mixtures containing this substance.

Toxic pollutant designated pursuant to section 307(a)(1) of the Federal Water Pollution Control Act and is subject to effluent limitations.

(AZ) ARIZONA 620 ug/L

(ME) MAINE 63 ug/L

(MN) MINNESOTA 600 ug/L

Used as a chemical intermediate, solvent, heat transfer liquid, deodorant, and insecticide; [ACGIH] Used as a degreasing agent, a paint solvent, paint remover, a cylinder lubricant, and a solvent for waxes, gums, resins, tars, rubber, oils, and asphalts; [HSDB]

Cancelled: no registered pesticide products in the USA; [HSDB]

Metal Degreasing [Category: Clean]

For 1,2 Dichlorobenzene (USEPA/OPP Pesticide Code: 059401) there are 0 labels match. /SRP: Not registered for current use in the U.S., but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses./

The active ingredient is no longer contained in any registered pesticide products ... "cancelled."

Solvent for waxes, gums, resins, tars, rubbers, oils, asphalts, insecticide for termites and locust borers

1,4-dichlorobenzene /at/ 0.5-l% w/w.

High purity grade: less than 0.2% 1,2,4-trichlorobenzene and less than 0.005% monochlorobenzene. Technical grade: less than 19.0% other dichlorobenzenes isomers, less than 1.0% trichlorobenzenes & less than 0.05% monochlorobenzene.

(1972) Estimated to be negligible

CHEMICAL PROFILE: o-Dichlorobenzene. Exports: 2002: 19 million pounds; 2003: 18 million pounds

(1972) 6.30X10+06 GRAMS

(1975) 1.23X10+9 GRAMS (PRINCPL CUSTMS DISTS)

CHEMICAL PROFILE: o-Dichlorobenzene. Imports: 2002: 700,000 pounds; 2003: 900,000 pounds

2023: 50,000 - <250,000 lb

(1972) 2.83X10+10 GRAMS

(1975) 2.48X10+10 GRAMS

6.4 to 40.9X10+9 g

2.2X10+9 g

For more U.S. Production (Complete) data for 1,2-DICHLOROBENZENE (8 total), please visit the HSDB record page.

53% for organic synthesis (chiefly for pesticides); 20% for solvent in toluene di-isocyanate process; 15% for misc solvent uses; 8% for dyestuffs mfr, 4% for misc uses (1973)

Organic synthesis (mainly for production of 3,4-dichloroaniline), 70%; solvents for toluene diisocyanate production, 15%; miscellaneous solvent usage, 8%; dye manufacture 4%; and other application, 3% (1978)

CHEMICAL PROFILE: o-Dichlorobenzene. Demand: 1995: 35 million lb; 1996: 35 million lb; 2000 /projected/: 36 million lb.

CHEMICAL PROFILE: o-Dichlorobenzene. Demand: 2002: 4 million pounds; 2003: 3 million pounds; 2007: 3 million pounds, projected

CHLORINATION OF BENZENE OR MONOCHLOROBENZENE IN THE PRESENCE OF A CATALYST

... by Sandmeyer procedure from appropriate chloroaniline, and along with o- and p-dichlorobenzenes, by chlorination of chlorobenzene.

Chlorobenzenes are prepared industrially by reaction of liquid benzene with gaseous chlorine in the presence of a catalyst at moderate temperature and atmospheric pressure. Hydrogen chloride is formed as a byproduct. Generally, mixtures of isomers and compounds with varying degrees of chlorination are obtained ... . /Chlorobenzenes/

... Avail in USA as technical grade typically containing 98.7% by wt of ortho-isomer & 1.3% of meta- & para-isomers combined. It has ... moisture content of 80 ppm. ... also avail in USA in grade which ... contains 83% of ortho-isomer, 17% of meta- & para-isomers ... an emulsifiable form of ... latter product can ... /be obtained/.

High purity grade: 98.0% minimum active ingredient; technical grade: 80-90% active ingredient

Technical-grade ortho-dichlorobenzene typically consists of 70-85% ortho-dichlorobenzene, <0.05% chlorobenzene and <0.5% trichlorobenzene, with the remainder as meta- and para-dichlorobenzene. Pure-grade ortho-dichlorobenzene consists of >99.8% ortho-dichlorobenzene, <0.05% chlorobenzene, <0.1% trichlorobenzene and <0.1% para-dichlorobenzene. ...Trade names for ortho-dichlorobenzene include Cloroben, Dilatin DB and Dowtherm E.

Composition of technical grade product: 65-85% 1,2-dichlorobenzene, <0.05 % chlorobenzene, <0.5 % trichlorobenzene, remainder 1,4- and 1,3-dichlorobenzene. Pure grade: >99.8% 1,2-dichlorobenzene, <0.05% chlorobenzene, <0.1% trichlorobenzene, <0.1% 1,4-dichlorobenzene.

Synthetic Rubber Manufacturing

Benzene, 1,2-dichloro-: ACTIVE

Separation of mixt containing m-, o-, and p-dichlorobenzenes by distillation and crystallization: Mueller, Wolz, French patent 1,374,863 (1964 to Bayer), CA 62, 493e (1965), corresponding to British patent 999,845.

Product discontinued by The Dow Chemical Company