1-[(2-ニトロ-4-メチルフェニル)アゾ]-2-ナフタレノール

Yellowish red solid

Hue varies considerably with particle size and therefore several shades are commercially available.

less than 1 mg/mL at 72 °F (NTP, 1992)

Slightly soluble in ethanol and xylene; poorly soluble in ethers and ketones.

Slightly soluble in water(0.8 g/L) ethanol(0.7 g/L), ethylene glycol methyl ether(0.9 g/L), acetone, and benzene; very soluble in mineral spirits, aromatic hydrocarbons and plasticizers.

518 to 522 °F (NTP, 1992)

270 to 272 °C

Yellowish-red to red powder or solid. (NTP, 1992)

CBI; Dry Powder

Yellowish-red to red solid; [CAMEO]

This chemical does not meet GHS hazard criteria for 56.9% (246 of 432) of all reports.

Danger

H318 (18.8%): Causes serious eye damage [Danger Serious eye damage/eye irritation]

P264+P265, P273, P280, P305+P354+P338, P317, P391, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 432 reports by companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Chemical: 2-Naphthalenol, 1-[(4-methyl-2-nitrophenyl)azo]-

Hazard Traits - Bioaccumulation; Environmental Persistence

2-Naphthalenol, 1-[2-(4-methyl-2-nitrophenyl)diazenyl]- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of 2-Naphthalenol, 1-[2-(4-methyl-2-nitrophenyl)diazenyl]- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

REACH registered substance: 1-(4-methyl-2-nitrophenylazo)-2-naphthol (EC: 219-372-2)

2-Naphthalenol, 1-[(4-methyl-2-nitrophenyl)azo]-: Does not have an individual approval but may be used under an appropriate group standard

Stains skin; May be absorbed through the skin; [CAMEO] An irritant; May cause serious injury to eyes; Possible sensitizer; Injury to adrenal glands, thyroid, spleen, liver, bone marrow, and kidneys in high-dose animal experiments; [MSDSonline]

C.I. PIGMENT RED 3 may form toxic gases with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. May form flammable gases with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.

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.

SMALL SPILLS AND LEAKAGE: If you spill this chemical, you should dampen the solid spill material with water, then transfer the dampened material to a suitable container. Use absorbent paper dampened with water to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Wash all contaminated surfaces with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.

RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992)

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc of 2.0X10+5(SRC), determined from a structure estimation method(2), indicates that C.I. Pigment Red 3 is expected to be immobile in soil(SRC). Volatilization of C.I. Pigment Red 3 from moist soil surfaces is not expected to be an important fate process(SRC) given an estimated Henry's Law constant of 1.2X10-11 atm-cu m/mole(SRC), using a fragment constant estimation method(3). C.I. Pigment Red 3 is not expected to volatilize from dry soil surfaces(SRC) based upon an estimated vapor pressure of 3.7X10-11 mm Hg(SRC), determined from a fragment constant method(4). Biodegradation data were not available(SRC, 2009).

AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 2.0X10+5(SRC), determined from a structure estimation method(2), indicates that C.I. Pigment Red 3 is expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is not expected(3) based upon an estimated Henry's Law constant of 1.2X10-12 atm-cu m/mole(SRC), developed using a fragment constant estimation method(4). According to a classification scheme(5), an estimated BCF of 10(SRC), from an estimated log Kow of 6.5(6) and a regression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is low(SRC). Biodegradation data were not available(SRC, 2009).

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), C.I. Pigment Red 3 , which has an estimated vapor pressure of 3.7X10-11 mm Hg at 25 °C(SRC), determined from a fragment constant method(2), is expected to exist solely in the particulate phase in the ambient atmosphere. Particulate-phase C.I. Pigment Red 3 may be removed from the air by wet or dry deposition(SRC). C.I. Pigment Red 3 contains chromophores that absorb at wavelengths >290 nm(3) and therefore may be susceptible to direct photolysis by sunlight(SRC).

The following link will take the user to the National Toxicology Program (NTP) Test Agent Search Results page, which tabulates all of the "Standard Toxicology & Carcinogenesis Studies", "Developmental Studies", and "Genetic Toxicity Studies" performed with this chemical. Clicking on the "Testing Status" link will take the user to the status (i.e., in review, in progress, in preparation, on test, completed, etc.) and results of all the studies that the NTP has done on this chemical.[Available from: http://ntp-apps.niehs.nih.gov/ntp_tox/index.cfm?fuseaction=ntpsearch.searchresults&searchterm=2425-85-6]

Used in paints, inks, plastics, rubber, cement, textile printing, and munitions; [HSDB]

Painting (Pigments, Binders, and Biocides) [Category: Paint]

Used in industrial finishes ... principal application is on air drying paints, and to a limited extent in printing inks.

Used in as a pigment in the manufacturing of paints, inks, plastics, rubber, textile printing

One of the most widely used of all red pigments on account of the bright scarlet hue, high tinctorial strength, good fastness to acids, alkalis and to light and economy. Some limitation is improved by the relatively poor fastness to organic solvents. Widely used in paints, printing inks, emulsion paints and distempers. Other uses are in synthetic resin lacquers and leather finishes, inks for foil and tinplate printing, paper coating and dyeing, wallpaper, linoleum, carbon papers, typewriter ribbons and student-grade artist materials. Rubber with good strength and fastness to vulcanisation but limited by solubility in rubber; celluloid, cellulose acetate, P/F, U/F, styrene and protein plastics but suffers from migration in some cases. Cement, because of fastness to lime. Textile printing for "print on" style with Aniline Black

2023: 100,000 - <250,000 lb

(1984) 4.40X10+8 g

Production volumes for non-confidential chemicals reported under the Inventory Update Rule. [Table#4934]

Synthetic Dye and Pigment Manufacturing

2-Naphthalenol, 1-[2-(4-methyl-2-nitrophenyl)diazenyl]-: ACTIVE

In full shade the pigment is very lightfast and weatherfast but shows poor tint lightfastness. It is characterized by poor fastness toward solvents and is likely to bloom in baking enamels.