MATERIAL SAFETY DATA SHEET

CITRIC ACID

Section I - IDENTIFICATION

PRODUCT: Citric Acid, anhydrous

SYNONYMS: 2-Hydroxy-1,2,3-propanetricarboxylic acid

CHEMICAL FORMULA: C₆H₈O₇

CHEMICAL ABSTRACT NO.: 77-92-9

PRODUCT CODE NO.: 11398

Section II - HAZARDOUS INGREDIENTS

Section III - HEALTH, TOXICITY & FIRST AID INFORMATION

INHALATION: Irritates, may burn. May cause mucous membrane irritation with sore throat, coughing and shortness of breath.  Remove patient to fresh air and keep warm. If not breathing, give artificial respiration. Seek medical attention.

INGESTION: Treatment not normally required.  If large amounts are ingested may cause gastrointestinal irritation, nausea, vomiting and diarrhea.  Do not induce vomiting. Seek medical attention.

EYE CONTACT: Irritant. May cause redness, pain, possible eye burns, conjunctivitis, ulceration and permanent cloudiness.  Rinse eyes with water for at least 15 minutes. Seek medical attention if irritation persists.

SKIN CONTACT: May cause irritation with discomfort, local redness and possible swelling. Repeated or prolonged contact may irritate the skin or cause dermatitis. Remove contaminated clothing, rinse affected area for at least 15 minutes. Seek medical attention if irritation persists.

PRIMARY ROUTES OF EXPOSURE: Eye and skin contact; inhalation of dust; ingestion.

OTHER HEALTH INFORMATION:

• LD₅₀ = 5.04 g/kg (oral, mouse)
• LD₅₀ = 3 g/kg (oral, rat)

TOXICITY INFORMATION:

• Carcinogenicty - N/D
• Sensitization - N/D
• Irritancy - N/D
• Teratogenicity - N/D
• Mutagenicity - N/D
• Toxicologically Synergistic Products - N/D
• Other Data - This product is expected to be readily biodegradable
  • COD = 728 mg O2/gram
  • BOD = 528 mg O2/g (5 days)
• Environmental effects - LC₅₀ = 440-706 mg/L (96 h, goldfish)

Section IV - PHYSICAL DATA

BOILING POINT: 175°C (decomposes)

FREEZING POINT: N/D

MELTING POINT: 153°C

VAPOUR DENSITY air=1): N/D

VAPOUR PRESSURE: N/D

pH: 2.2 (1%), 1.8 (5%), 1.7 (10%), 0.8 (50%)

% VOLATILE: N/D EVAPOURATION RATE (Butyl Acetate=1): N/D

SOLUBILITY IN WATER: 162 grams/100 ml @25°C

ODOUR THRESHOLD: N/D

SPECIFIC GRAVITY (water=1): 1.665@20°C

APPEARANCE AND ODOUR: Odourless free flowing white crystals.

COEFFICIENT OF WATER/OIL DISTRIBUTION: N/D

PHYSICAL STATE: solid crystals

Section V - FIRE AND EXPLOSION HAZARDS

FLASH POINT & METHODS USED: not applicable

UPPER & LOWER FLAMMABLE LIMIT:

• Lower = 8 grams/cubic foot
• Upper = 65 grams/cubic foot

AUTOIGNITION TEMPERATURE: 345°C

CONDITIONS OF FLAMMABILITY: N/D

EXTINGUISHING MEDIA: water spray, dry chemical, foam, carbon dioxide

EXPLOSION DATA:

Sensitivity to mechanical impact - not sensitive
Sensitivity to static discharge - not sensitive

SPECIAL FIRE FIGHTING PROCEDURES & PRECAUTIONS: none

UNUSUAL FIRE & EXPLOSION HAZARDS: N/D

Section VI - REACTIVITY

STABILITY: Stable

HAZARDOUS POLYMERIZATION: Will not occur

CONDITIONS & MATERIALS TO AVOID: Strong alkalis, metal nitrates

HAZARDOUS DECOMPOSITION PRODUCTS: CO, CO₂

Section VII - EMPLOYEE PROTECTION

CONTROL MEASURES: Use local ventilation capable of minimizing dust emissions.

RESPIRATORY PROTECTION: Not normally required if ventilation is used, otherwise use NIOSH approved dust mask.

PROTECTIVE CLOTHING: Chemical resistant gloves, long sleeved shirt and trousers should be worn.

EYE PROTECTION: Wear tight fitting safety goggles. An eyewash and shower should be available.

Section VIII - ENVIRONMENTAL PROTECTION

ENVIRONMENTAL PRECAUTIONS: Use in a well ventilated area

SPILL OR LEAK PRECAUTIONS: Wear plastic apron, boots, chemical-resistant gloves and safety goggles. Sweep up spill, transferring residue to a salvage container. Hold for disposal.

WASTE DISPOSAL: Follow applicable municipal, provincial and federal regulations. Seek the advice of a professional disposal service.

Section IX - REGULATORY CONTROLS

DEPT. OF TRANSPORTATION: Not regulated under the Transport of Dangerous Goods Act.

OTHER REGULATORY REQUIREMENT: none

WHMIS CLASS: E

CANADIAN DSL INVENTORY STATUS: All components of this product are either on the Domestic Substances List or the Non-Domestics Substances List or Exempt.

Section X - PRECAUTIONS: HANDLING, STORAGE & USAGE

Store in a cool, dry, well-ventilated place away from incompatible materials. Keep Bags dry at all times.

PREPARED BY: MSDS Department                                  DATE: Update January 10, 2008