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HCID 24517Erstellt: 27. Oktober 2026

Zinkdithionit

Zinc dithionite · ZINC HYDROSULFITE · ZINCHYDROSULPHITE · Dithionous acid zinc salt · Dithionous acid, zinc salt (1:1)

https://huagongshe.com/de/chemical/24517

Molekülstruktur von Zinkdithionit

Identifikatoren & physikalische Daten

CAS No.7779-86-4
SummenformelO4S2Zn
Durchschnittliche Molmasse193,5 g/mol
Monoisotopische Masse191,852943 g/mol
SMILESO=S([O-])S(=O)[O-].[Zn+2]
InChIKeyPENRVBJTRIYHOA-UHFFFAOYSA-L
PubChem CID24517
EC No.231-942-2
DTXSIDDTXSID00894224
Lokaler NameZinkdithionit

Chemische & physikalische Eigenschaften

Polarare Oberfläche (TPSA)119
H-Brücken-Donoren0
H-Brücken-Akzeptoren6
Frei drehbare Bindungen0
Schwere Atome7
Formalladung0
Komplexität60,5
StoffklassenMetals -> HydrosulfitesReactive agents - 1st degree
GeruchSlight sulfur dioxide odor
LebensmittelzusatzstoffeNUTRIENT SUPPLEMENT -> FDA Substance added to food
Color/FormWhite amorphous solid
Löslichkeit28.00 lb/100 lb water at 68 °F40 at 20℃
DecompositionDecomp giving off irritating sulfur dioxide.When heated to decomposition ... emits toxic vapors of ... /sulfur oxides/.
Food Contact SubstancesFCS -> FDA Inventory of Food Contact Substances Listed in 21 CFR
Physical DescriptionZinc 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.[CAMEO]
Other Experimental PropertiesSolubility: 40 g/100 g water at 20 °CMP: 200 °C (decomp) /Zinc hydrosulfite dihydrate/
AggregatzustandLiquid, solid
Farbewhite amorphous solid
EPA chemische InformationenZinc hydrosulfite (7779-86-4)

Sicherheit & Vorschriften

Hazards IdentificationWater-reactive material (WR)
Regulatorische InformationenChemical: 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.)
DOT-KennzeichnungClass 9
BrandgefahrenSpecial Hazards of Combustion Products: Decomposes giving off irritating SO2. (USCG, 1999)· Some may burn but none ignite readily.
BrandpotenzialNot flammable
GesundheitsgefahrenINHALATION: Irritation of nose and throat. EYES: Mild irritant. SKIN: Irritant. INGESTION: Nausea and vomiting. (USCG, 1999)· Inhalation of material may be harmful.
GefahrenübersichtReacts with water to form hydrogen sulfide and sulfur dioxide[ERG 2016] An irritant to the skin, eyes, and respiratory tractReacts with water to form sulfur dioxide[CAMEO] See Zinc.
DOT-Nummer und Handbuch1931 171
FDA-AnforderungenSubstances migrating to food from paper and paperboard products used in food packaging that are generally recognized as safe for their intended use, within the meaning of section 409 of the Act. Zinc hydrosulfite is included on this list.
Reaktive GruppeAnhydrides
Reactivity AlertsStrong Reducing Agent
Reactivity ProfileUndergoes 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.
BrandbekämpfungExcerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:

Anwendungen & Verwendung

Verwenden

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.

Freisetungsmaßnahmen· 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.
Erste HilfeCall a physician.General First Aid:
Expositionsschutz und Persönliche Schutzausrüstung· 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)]
BrandbekämpfungsverfahrenIf material on fire or involved in fire: Use water only if flooding quantities are available. Use dry chemical, dry sand, or carbon dioxide.
ReinigungsverfahrenSRP: 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 ...
Freisetung ohne BrandExcerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:
EntsorgungsverfahrenSRP: 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 qualitypotential migration in soil or watereffects on animal and plant lifeand conformance with environmental and public health regulations.
Preventive MeasuresIf 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.
Isolation and EvacuationExcerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]:Immediate precautionary measureWhen spilled in water
Toxic-by-Inhalation (TIH) GasH2S SO2 - when spill Zinc hydrosulfite into water.
Minimum Risk LevelIntermediate Oral: 0.3 mg/kg/day (L134) Chronic Oral: 0.3 mg/kg/day (L134)
TreatmentZinc poisoning is treated symptomatically, often by administering fluids such as water or milk, or with gastric lavage. (L49)
Gesundheitliche AuswirkungenChronic exposure to zinc causes anemia, atazia, lethargy, and decreases the level of good cholesterol in the body. It is also believed to cause pancreatic and reproductive damage. (L49)
Unerwünschte WirkungenOther Poison - Chemical Asphyxiant
ExpositionspfadeInhalation (L49)oral (L49)dermal (L49)
ToxizitätsübersichtAnaemia 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)
Signs and SymptomsIngestion 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)
Human Toxicity Excerpts/SIGNS AND SYMPTOMS/ Inhalation: irritation of nose and throateyes: mild irritantskin: irritantingestion: nausea and vomiting.
Carcinogen ClassificationNo indication of carcinogenicity to humans (not listed by IARC).
Probable Routes of Human ExposureNIOSH (NOES Survey 1981-1983) has statistically estimated that 16,852 workers (1,463 of these were female) were potentially exposed to zinc dithionite in the US(1)
Antidote and Emergency TreatmentImmediate 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.
CERCLA-MeldepflichtmengenPersons 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).
Clean Water Act AnforderungenToxic 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.
DHS Chemicals of Interest (COI)Zinc hydrosulfiteA Commercial GradeA Placarded AmountChemical or material that can be mixed with readily available materials.
Landesrichtlinien für Trinkwasser(AZ) ARIZONA 5000 ug/L /Zinc/(MN) MINNESOTA 2000 ug/L /Zinc/
Bundesrichtlinien für TrinkwasserEPA 5000 ug/L /Zinc/EPA 2000 ug/L /Zinc, Lifetime health advisory/
TSCA-Inventar-StatusTSCA listed
UN-TransportnummerUN 1931 (ZINC DITHIONITE (ZINC HYDROSULPHITE))
Gefahrenklasse9
VerpackungsgruppeIII
Gefahrstoffdaten7779-86-4(Hazardous Substances Data)