7779-86-4O=S([O-])S(=O)[O-].[Zn+2]PENRVBJTRIYHOA-UHFFFAOYSA-LZinc dithionite is a white powder. It is noncombustible. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. It is used to bleach wood pulp, textiles, and other naturally occurring materials.
7779-86-4DTXSID00894224Metals -> Hydrosulfites
Reactive agents - 1st degree
Decomp giving off irritating sulfur dioxide.
When heated to decomposition ... emits toxic vapors of ... /sulfur oxides/.
Zinc dithionite is a white powder. It is noncombustible. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. It is used to bleach wood pulp, textiles, and other naturally occurring materials.
White powder; [CAMEO]
Water-reactive material (WR)
Water-reactive material (WR)
Chemical: Dithionous acid, zinc salt (1:1)
The New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)
Special Hazards of Combustion Products: Decomposes giving off irritating SO2. (USCG, 1999)
· Some may burn but none ignite readily.
· Some may burn but none ignite readily.
INHALATION: Irritation of nose and throat. EYES: Mild irritant. SKIN: Irritant. INGESTION: Nausea and vomiting. (USCG, 1999)
· Inhalation of material may be harmful.
· Inhalation of material may be harmful.
1931 171
1931 171
Zinc can enter the body through the lungs, skin, and gastrointestinal tract. Intestinal absorption of zinc is controlled by zinc carrier protein CRIP. Zinc also binds to metallothioneins, which help prevent absorption of excess zinc. Zinc is widely distributed and found in all tissues and tissues fluids, concentrating in the liver, gastrointestinal tract, kidney, skin, lung, brain, heart, and pancreas. In the bloodstream zinc is found bound to carbonic anhydrase in erythrocytes, as well as bound to albumin, _2-macroglobulin, and amino acids in the the plasma. Albumin and amino acid bound zinc can diffuse across tissue membranes. Zinc is excreted in the urine and faeces. (L49)
Used to bleach wood pulp, textiles, and other natural materials; [CAMEO]
Pulp and Paper Processing [Category: Industry]
Bleach, especially textile, paper; reducing agent
Brightening groundwood, kraft, and other paper pulps; to treat beet and cane sugar juices; depressant in mining flotations; bleaching textiles, vegetable oils, straw, hemp, vegetable tannins, animal glue, etc.
(1972) 1.82X10+7 grams
(1974) 6.74X10+7 grams
(1986) 564,228 lb
(1968) Approx 5.45X10+9 grams
Production volumes for non-confidential chemicals reported under the Inventory Update Rule. [Table#2779]
Production volume for non-confidential chemicals reported under the 2006 Inventory Update Rule. Chemical: Dithionous acid, zinc salt (1:1). Aggreated National Production Volume: 10 to <50 million lbs.
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Undergoes a self-accelerating hydrolysis reaction upon contact with water, producing thiosulfate and bisulfite compounds and heat in neutral or acidic aqueous solution. Reacts with oxidizing agents to generate heat and products that may be flammable, combustible, or otherwise reactive. These reactions may be violent.
· 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.
· Do not touch or walk through spilled material.
· 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.
· Do not touch or walk through spilled material.
Call a physician.
General First Aid:
General First Aid:
· Wear positive pressure self-contained breathing apparatus (SCBA).
· Wear positive pressure self-contained breathing apparatus (SCBA).
TIH (Toxic Inhalation Hazard) - Term used to describe gases and volatile liquids that are toxic when inhaled. Some are TIH materials themselves, e.g., chlorine, and some release TIH gases when spilled in water, e.g., chlorosilanes. [ERG 2016].
0.1 [mg/m3] (respirable fraction), 2 mg/m3 (inhalable fraction) for Zn inorg. cmpnds[German Research Foundation (DFG)]
SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.
Environmental considerations: 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 contained with a flexible impermeable membrane liner./ Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water.
Environmental considerations: Water spill: Add calcium hypochlorite. Neutralize with agricultural lime (CaO), crushed limestone, or sodium bicarbonate. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates ...
SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity 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 and plant life; and conformance with environmental and public health regulations.
If material not on fire and not involved in fire: Do not use water. Keep material out of water sources and sewers. Avoid breathing dusts, and fumes from burning material. Do not handle broken packages without protective equipment. Wash away any material which may have contacted the body with copious amounts of water or soap and water.
SRP: The scientific literature for the use of contact lenses by industrial workers is inconsistent. The benefits or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:
Immediate precautionary measure
When spilled in water
When spilled in water
Immediate precautionary measure
When spilled in water
H2S SO2 - when spill Zinc hydrosulfite into water.
H2S SO2 - when spill Zinc hydrosulfite into water.
Anaemia results from the excessive absorption of zinc suppressing copper and iron absorption, most likely through competitive binding of intestinal mucosal cells. Unbalanced levels of copper and zinc binding to Cu,Zn-superoxide dismutase has been linked to amyotrophic lateral sclerosis (ALS). Stomach acid dissolves metallic zinc to give corrosive zinc chloride, which can cause damage to the stomach lining. Metal fume fever is thought to be an immune response to inhaled zinc. (L48, L49, A49)
Ingestion of large doses of zinc causes stomach cramps, nausea, and vomiting. Acute inhalation of large amounts of zinc causes metal fume fever, which is characterized by chills, fever, headache, weakness, dryness of the nose and throat, chest pain, and coughing. Dermal contact with zinc results in skin irritation. (L49)
Immediate first aid: Remove patient from contact with the material. Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Zinc and related compounds/
Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Anticipate seizures and treat if necessary ... . Monitor for shock and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool. Administer activated charcoal ... . /Zinc and related compounds/
Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Positive-pressure ventilation techniques with a bag valve mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Consider administering a beta agonist such as albuterol for severe bronchospasm ... . Monitor cardiac rhythm and treat arrhythmias if necessary ... . Start IV administration of D5W /SRP: "To keep open", minimal flow rate/. Use 0.9% saline (NS) or lactated Ringer's (LR) if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. Consider vasopressors if patient is hypotensive with a normal fluid volume. Watch for signs of fluid overload ... . Treat seizures with diazepam or lorazepam ... . Use proparacaine, hydrochloride to assist eye irrigation ... . /Zinc and related compounds/
Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Sulfur and related compounds/
For more Antidote and Emergency Treatment (Complete) data for Zinc hydrosulfite (6 total), please visit the HSDB record page.
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 1000 lb or 454 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).
Toxic pollutant designated pursuant to section 307(a)(1) of the Federal Water Pollution Control Act and is subject to effluent limitations. /Zinc and compounds/
Zinc hydrosulfite 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.
Zinc hydrosulfite
A Commercial Grade
A Placarded Amount
Chemical or material that can be mixed with readily available materials.
(AZ) ARIZONA 5000 ug/L /Zinc/
(MN) MINNESOTA 2000 ug/L /Zinc/
EPA 5000 ug/L /Zinc/
EPA 2000 ug/L /Zinc, Lifetime health advisory/
Grade: technical
Grade or purity: 86% to 88% zinc hydrosulfite
使用Brightening groundwood, kraft, and other paper pulps; to treat beet and cane sugar juices; depressant in mining flotations; bleaching textiles, vegetable oils, straw, hemp, vegetable tannins, animal glue, etc.
一般的な説明ZINC HYDROSULFITE is a white powder. ZINC HYDROSULFITE is noncombustible. ZINC HYDROSULFITE is soluble in water. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. ZINC HYDROSULFITE is used to bleach wood pulp, textiles, and other naturally occurring materials.