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Product Name: Metatartaric Acid
Chemical Formula: (C4H4O6)n
Other Names: Poly(2,3-dihydroxybutanedioic acid)
Recommended Use: Wine stabilization, food additive, industrial acidulant
Manufacturer Contact: Name, address, phone, emergency phone, email
CAS Number: 9057-55-2
EC Number: 618-531-1
GHS Classification: Eye irritation, Skin irritation
Indications of Danger: May irritate eyes, skin, and respiratory tract; dust may cause coughing, sneezing, discomfort
Label Elements: Signal word "Warning"; exclamation mark pictogram
Potential Health Effects: Dust can bother eyes, nose, and throat; swallowing may irritate mouth and stomach
Environmental Hazards: Low hazard for environment at recommended doses, large releases may affect aquatic organisms
Physical Hazards: Non-flammable, can create airborne dust
Substance: Metatartaric Acid
Synonyms: Polymerized tartaric acid, E353 food additive
Concentration: Greater than 98%
Impurities: Less than 1% water, trace tartaric acid monomers
Chemical Family: Organic carboxylic acid
Inhalation: Bring person to fresh air, support breathing, seek help if symptoms stay
Eye Contact: Rinse eyes with clean water, keep eyelids open, remove lenses, see doctor if discomfort continues
Skin Contact: Wash with soap and water, take off contaminated clothing, check for rash or redness
Ingestion: Rinse mouth, call poison center or doctor if feeling unwell, never give anything by mouth to an unconscious person
Most Important Symptoms: Redness, eye discomfort, coughing, mild mucous membrane irritation
Suitable Extinguishing Media: Use water spray, foam, dry chemical, or CO2 for nearby materials
Unsuitable Media: Direct water jets may spread dust
Hazardous Combustion Products: Carbon dioxide, carbon monoxide, organic fumes
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective clothing
Special Precautions: Stay upwind, prevent runoff into drains
Personal Precautions: Use proper PPE: dust mask, safety goggles, gloves
Spill Clean-Up: Avoid dust formation, sweep up, place in labeled containers, ventilate area
Environmental Precautions: Do not flush large quantities into drains or watercourses
Methods for Containment: Prevent dust from spreading, use antistatic tools, clean area with wet methods preferable to dry sweeping
Precautions for Safe Handling: Avoid dust, wash hands after use, keep away from food and drinks
Storage Conditions: Store cool, dry, closed containers, avoid humidity and strong bases
Incompatible Materials: Strong alkalies, strong oxidizers
Specific End Uses: Store as directed for industrial or food use only
Engineering Controls: Use local exhaust ventilation, enclose operations to control dust
Personal Protection: Safety goggles, dust mask or respirator approved for particulates, chemical-resistant gloves, lab coat
Hygiene Measures: Wash hands after handling, take off dirty work clothes
Exposure Limits: No established workplace limits for metatartaric acid; keep dust below general nuisance dust threshold (OSHA/NIOSH)
Form: Fine, white to off-white powder
Odor: Odorless or faint acidic
Melting Point: Above 220°C (decomposes)
Boiling Point: Not applicable
Solubility: Soluble in water, more stable in cold than in hot
pH (1% Solution): 1.5–2.5
Density: 1.6–1.7 g/cm3
Vapor Pressure: Negligible
Partition Coefficient (log Kow): Not available
Other Data: Decomposes when exposed to heat above 150°C; can hydrolyze back to tartaric acid in solution over time
Chemical Stability: Stable under recommended storage, decomposes slowly in heat and humidity
Reactivity: Non-reactive under expected conditions
Incompatible Substances: Strong acids and alkalis accelerate decomposition; oxidizing agents
Hazardous Decomposition: CO2, CO, tartaric acid
Conditions to Avoid: High temperatures, moisture, base contact
Acute Toxicity: Low oral toxicity (rat LD50 > 2,000 mg/kg estimated), not toxic by inhalation at typical workplace exposures
Skin Corrosion/Irritation: May cause mild irritation on repeated contact
Eye Effects: Dust moderately irritates eyes
Respiratory Sensitization: Inhaling dust triggers temporary discomfort, no sensitization reported
Chronic Effects: No evidence of long-term effects, not suspected of carcinogenicity, mutagenicity, or reproductive toxicity
Other: Not listed by IARC, NTP, OSHA as a confirmed carcinogen
Ecotoxicity: No significant harm expected at low concentrations, excessive release may decrease local water pH insignificantly
Persistence and Degradability: Biodegradable, breaks down to tartaric acid and then to CO2 and water
Bioaccumulation: No bioaccumulation observed
Mobility: Completely soluble, disperses in water
Other Effects: Large spills can temporarily upset aquatic microbe populations
Disposal Methods: Dispose according to local, state, and national rules; landfilling or incineration in controlled facility
Unused Product: Send to approved chemical waste facility
Contaminated Packaging: Rinse, empty container, recycle or dispose as hazardous waste per regulations
Note: Avoid uncontrolled disposal into watercourses or soil
UN Number: Not classified as dangerous for transport
Proper Shipping Name: Metatartaric Acid
Transport Hazard Class: Not hazardous
Packing Group: Not assigned
Environmental Hazards: None assigned
Special Precautions: Use dry containment and keep packaging secure to avoid accidental spills or dust release
Safety, Health and Environmental Regulations: Covered under general worker safety and chemical management regulations
REACH/TSCA: Registered, complies with major chemical safety requirements in Europe and North America
GHS Compliance: Labeling and SDS in line with globally harmonized system
Food Use Regulation: Approved as a food additive (E353) in many jurisdictions; adhere to use limits and labeling
Other: Not listed as hazardous waste, not subject to major restrictions outside occupational and food safety guidelines
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
