Substance Name: L(+)Potassium Sodium Tartrate Tetrahydrate
Synonyms: Rochelle Salt, Seignette Salt
Chemical Formula: KNaC4H4O6·4H2O
CAS Number: 6381-59-5
Recommended Use: Laboratory reagent, analytical chemistry, emulsifier in food, ingredient in Fehling’s solution
Supplier Details: (Contact the manufacturer or distributor for specific supplier information)
Emergency Contact: (Refer to local/national emergency numbers for chemical exposure)
GHS Classification: Not classified as hazardous under GHS criteria
Physical Hazards: Not combustible, forms potentially irritating dust
Health Hazards: Inhalation, eye contact, skin contact may cause mild irritation
Environmental Hazards: Large spills may affect water quality
Label Elements: No pictogram required, precautionary statements apply for good hygiene
Precautionary Statements: Avoid generation of dust, do not inhale, wash hands after handling, avoid contact with eyes
Chemical Name: L(+)Potassium Sodium Tartrate Tetrahydrate
Common Name: Rochelle Salt
CAS Number: 6381-59-5
Percentage: 100%
Impurities or Additives: None expected for reagent grade; otherwise refer to certificate of analysis
Molecular Weight: 282.22 g/mol
Inhalation: Remove from exposure, move to fresh air, rinse mouth with water if discomfort remains, seek medical attention for persistent irritation
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy to do, continue rinsing, consult physician if symptoms persist
Skin Contact: Wash skin with plenty of soap and water, remove contaminated clothing, seek medical attention for irritation or dermatitis
Ingestion: Rinse mouth, drink water to dilute, do not induce vomiting unless directed by medical personnel, seek medical advice if symptoms develop or significant amounts are swallowed
Suitable Extinguishing Media: Water spray, foam, carbon dioxide, dry chemical
Unsuitable Media: None identified under normal conditions
Hazards from the Substance: Not flammable, decomposes at high temperatures producing irritant fumes (may include carbon oxides)
Protective Equipment: Firefighters wear self-contained breathing apparatus and full protective clothing
Precautions for Firefighters: Approach fire from upwind to avoid exposure to fumes, prevent runoff from entering drains and waterways
Decomposition Products: Potassium oxides, sodium oxides, carbon monoxide, carbon dioxide
Personal Precautions: Ventilate area, avoid dust clouds, use appropriate personal protective equipment (gloves, eye protection, dust mask)
Environmental Precautions: Prevent spillage from entering drains, sewers, or water sources; contain with earth or sand
Spill Response: Sweep up gently, collect in suitable labeled containers for recovery or disposal, wash spill area with water, avoid raising dust
Cleanup Procedures: Use non-sparking tools, avoid water runoff near sensitive sites, report large spills to authorities as required by local regulations
Handling: Work in well-ventilated areas, minimize generation and accumulation of dust, use personal protective equipment to reduce exposure risk, handle in accordance with good laboratory or industrial hygiene practices
Hygiene Practices: No eating, drinking, or smoking during use, wash hands and face thoroughly after handling, launder contaminated clothing before reuse
Storage: Keep container tightly closed in a dry, cool, well-ventilated area protected from incompatible substances (strong oxidizers, acids), store away from heat sources and moisture
Container Requirements: Store in original packaging or compatible, labeled containers to avoid confusion or accidental misuse
Occupational Exposure Limits: No specific exposure limit set; control dust levels below nuisance dust standards (typically 10 mg/m³ total dust, 5 mg/m³ respirable fraction)
Engineering Controls: Local exhaust ventilation, process enclosure, good general ventilation
Personal Protective Equipment (PPE): Safety goggles or face shield for eye protection, dust mask or respirator if airborne dust becomes significant, chemical-resistant gloves, long-sleeved clothing, closed-toe shoes
Workplace Monitoring: Monitor airborne dust to ensure compliance, maintain clean work areas
Environmental Controls: Avoid discharge to environment, collect spills
Appearance: White crystalline powder or colorless crystals
Odor: Odorless
Odor Threshold: Not applicable
pH (5% solution): 7.0 – 8.5
Melting Point: Decomposes at approximately 75-80°C (loses water of crystallization), full decomposition above 220°C
Boiling Point: Not applicable
Flash Point: Not applicable (non-flammable)
Evaporation Rate: Not applicable
Flammability: Not flammable
Vapor Pressure: Negligible
Vapor Density: Not applicable
Solubility in Water: Soluble (approx. 630 g/L at 20°C)
Partition Coefficient (log Kow): Not determined
Decomposition Temperature: Above 220°C
Viscosity: Not applicable
Density: 1.79 g/cm³ (20°C)
Chemical Stability: Stable under routine storage and handling at recommended temperatures
Possibility of Hazardous Reactions: None expected during normal conditions
Conditions to Avoid: Excessive heat, open flames, contact with strong acids/oxidizers
Materials to Avoid: Strong acids, strong oxidizers
Hazardous Decomposition Products: Carbon oxides, potassium oxides, sodium oxides, possible irritating fumes on thermal decomposition
Reactivity: Low under standard environmental and storage conditions
Routes of Exposure: Inhalation, dermal contact, ingestion, eye contact
Acute Toxicity: Not acutely toxic by oral, dermal, or inhalation routes in typical quantities
Skin Corrosion/Irritation: May cause mild, reversible irritation on prolonged contact
Serious Eye Damage/Irritation: May cause irritation
Respiratory Sensitization: Not considered a sensitizer
Skin Sensitization: Not a skin sensitizer
Germ Cell Mutagenicity: No data indicating mutagenic effects
Carcinogenicity: Not listed as carcinogenic by IARC, NTP, OSHA
Reproductive Toxicity: No adverse reproductive effects known
STOT (Single/Repeated Exposure): No data showing organ toxicity, large amounts by ingestion may cause gastrointestinal discomfort (nausea, vomiting, diarrhea)
Aspiration Hazard: Not an aspiration hazard
Ecotoxicity: Not expected to be hazardous to aquatic or terrestrial environments in small quantities, large releases may disrupt aquatic chemistry by mineral load
Persistence and Degradability: Expected to be readily biodegradable, naturally occurring organic acid salt
Bioaccumulative Potential: Low, does not bioaccumulate
Mobility in Soil: Highly soluble, potential for movement in soil and water
Other Adverse Effects: None known, avoid large uncontrolled releases to water bodies
Disposal Methods: Dispose of in accordance with local, regional, and national regulations; for small amounts, dissolve in excess water and flush to sewer if permitted
Container Disposal: Rinse and recycle or dispose of containers per local requirements, do not reuse containers for food or drink
Precautions for Disposal: Avoid release of dust during disposal, do not dispose of into surface water or groundwater systems
Waste Code: Non-hazardous (U.S. EPA), local rules may vary
UN Number: Not regulated for transport
Proper Shipping Name: Not classified as dangerous goods
Transport Hazard Class: None
Packing Group: None
Marine Pollutant: No
Special Precautions: Protect from moisture in transit, secure loads to prevent shifting and breakage
Regulation: Not listed as hazardous under US OSHA Hazard Communication Standard
TSCA: Listed
REACH: Exempt or registered; check European inventories for status
DSL/NDSL (Canada): Listed
California Proposition 65: Not listed
WHMIS Classification (Canada): Not classified
SARA Title III (Sections 302/304/311/312/313): Not listed
Other Local/Regional Requirements: Check local regulatory restrictions as guidance may differ; provide safety training for handling in workplaces
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