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SECTION 1. CHEMICAL IDENTIFICATION

CHEMINFO Record Number: 671
CCOHS Chemical Name: Calcium acetate

Synonyms:
Acetate de calcium
Acetic acid, calcium salt
Brown acetate
Calcium diacetate
Gray acetate
Lime acetate
Lime pyrolignite
Vinegar salts

CAS Registry Number: 62-54-4
Other CAS Registry Number(s): 5743-26-0
RTECS Number(s): AF7525000
EU EINECS/ELINCS Number: 200-540-9
Chemical Family: Saturated aliphatic carboxylic acid salt / saturated aliphatic monocarboxylic acid salt / alkanoic acid salt / acetic acid salt / acetate / calcium salt
Molecular Formula: C4-H6-Ca-O4
Structural Formula: (CH3-CO-O)2--.Ca++

SECTION 2. DESCRIPTION

Appearance and Odour:
White to brown or gray, crystals or powder. Slight odour of acetic acid (colour and odour may depend on purity of product).(5); hygroscopic (absorbs moisture from the air).

Odour Threshold:
Information not available

Warning Properties:
Insufficient information for evaluation

Composition/Purity:
Calcium acetate is one of the soluble salts of acetic acid. It has many similarities (properties and hazards) to other acetates. This record contains the available information specific for calcium acetate, supplemented with general information on acetate salts which is applicable to calcium acetate. It is available in both an anhydrous (CAS 62-54-4) and hydrated forms (monohydrate (CAS 5743-26-0) and dihydrate). Except where indicated, all information in this record applies to all forms of calcium acetate. Commercially it is available in technical, brown, grey, pure and reagent grades.(1) Low level impurities may include heavy metals such as iron, sulfates, chlorides, and magnesium and alkali salts.

Uses and Occurrences:
Used in manufacture of acetone, acetic acid, acetates; mordant in dyeing and printing of textiles; stabilizer in resins; additive to calcium soap lubricants; food additive (antimold agent); and corrosion inhibitor.


SECTION 3. HAZARDS IDENTIFICATION

EMERGENCY OVERVIEW:
White to brown or grey, hygroscopic crystals or powder, with a slight acetic acid odour. POTENTIAL COMBUSTIBLE DUST HAZARD. Powdered material may form explosive dust-air mixtures. Essentially non-toxic.



POTENTIAL HEALTH EFFECTS

Effects of Short-Term (Acute) Exposure

Inhalation:
Calcium acetate is probably non-toxic. High concentrations of dust may cause coughing and mild, temporary irritation.

Skin Contact:
Dusts, mists or solutions can probably cause slight skin irritation based on information for related acetates. It is probably not absorbed through the skin to a significant extent.

Eye Contact:
Dusts or mists can probably cause mild eye irritation based on information for related acetates. Some tearing, blinking and mild temporary pain may occur as the solid material is rinsed from the eye by tears.

Ingestion:
Calcium acetate is low in oral toxicity. Ingestion of small doses (less than 10 g) would probably not produce ill effects, based on information for related acetates and the use of acetic acid in diets.

Effects of Long-Term (Chronic) Exposure

INHALATION: Calcium acetate probably only causes minor, reversible effects on the lungs.(3) In general, long-term exposures to high concentrations of dust may cause increased mucous flow in the nose and respiratory system airways.(4) This condition usually disappears when exposure stops.
SKIN: Prolonged or repeated contact may cause redness, drying and cracking of the skin (dermatitis).

Carcinogenicity:

No human or animal information available. Probably not carcinogenic.

The International Agency for Research on Cancer (IARC) has not evaluated the carcinogenicity of this chemical.

The American Conference of Governmental Industrial Hygienists (ACGIH) has no listing for this chemical.

The US National Toxicology Program (NTP) has not listed this chemical in its report on carcinogens.

Teratogenicity and Embryotoxicity:
No human or animal information is available. Probably not teratogenic or embryotoxic.

Reproductive Toxicity:
No human or animal information is available. Probably not a reproductive hazard.

Mutagenicity:
No human or animal in vivo studies are available. Probably not mutagenic.

Toxicologically Synergistic Materials:
Information not available

Potential for Accumulation:
Calcium acetate can enter the body by inhalation or ingestion. It does not accumulate. Calcium and acetate ions are normally found in the body. About one third of ingested calcium ion is absorbed. Calcium ion is excreted mainly in the feces and the urine. The acetate ion is rapidly and completely metabolized.


SECTION 4. FIRST AID MEASURES

Inhalation:
If symptoms are experienced, remove source of contamination or move victim to fresh air. If symptoms persist, obtain medical advice immediately.

Skin Contact:
No health effects expected. If irritation does occur, flush with lukewarm, gently flowing water for 5 minutes or until chemical is removed.

Eye Contact:
Do not allow victim to rub eye(s). Let the eye(s) water naturally for a few minutes. Have victim look right and left, and then up and down. If particle/dust does not dislodge, flush with lukewarm, gently flowing water for 5 minutes or until particle/dust is removed, while holding eyelid(s) open. If irritation persists, obtain medical attention. DO NOT attempt to manually remove anything stuck to eye(s).

Ingestion:
If irritation or discomfort occur, obtain medical advice immediately.

First Aid Comments:
All first aid procedures should be periodically reviewed by a doctor familiar with the material and its conditions of use in the workplace.



SECTION 5. FIRE FIGHTING MEASURES

Flash Point:
Not applicable. Calcium acetate probably does not form a vapour.

Lower Flammable (Explosive) Limit (LFL/LEL):
Not applicable

Upper Flammable (Explosive) Limit (UFL/UEL):
Not applicable

Autoignition (Ignition) Temperature:
Not available

Sensitivity to Mechanical Impact:
Not sensitive. Stable material.

Combustion and Thermal Decomposition Products:
Carbon monoxide and carbon dioxide (under fire conditions) (9), and acetone and calcium carbonate (above 160 deg C).(10)

Flammable Properties:

Extinguishing Media:
Carbon dioxide, dry chemical powder, alcohol foam, polymer foam, water fog or mist.(9)

Fire Fighting Instructions:
Evacuate area and fight fire from a safe distance or a protected location. Approach fire from upwind to avoid toxic decomposition products. Avoid generating dust to minimize risk of explosion.
Water spray, fog or foam can be used to extinguish fires involving calcium acetate. Water or foam may cause frothing. However, a water spray or fog that is gently applied to the surface of the liquid, preferably with a fine spray or fog nozzle, will cause frothing that will blanket and extinguish the fire. In addition, water can be used in the form of spray or fog to present dust formation, absorb heat, keep containers cool and protect fire-exposed material. If a leak or spill has not ignited, use water spray to disperse the vapours and to protect personnel attempting to stop a leak. Water spray may be used to flush spills away from ignition sources. Solid streams of water may be ineffective and spread material.
As in any fire, wear self-contained breathing apparatus (SCBA), pressure-demand, (MSHA/NIOSH approved or equivalent) and full protective equipment (Bunker Gear).



NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) HAZARD IDENTIFICATION

NFPA - Comments:
NFPA has no listing for this chemical in Codes 49 or 325.


SECTION 9. PHYSICAL AND CHEMICAL PROPERTIES

Molecular Weight: 158.17 (anhydrous); 176.19 (monohydrate); 194.21 (diphydrate)

Conversion Factor:
Not applicable

Physical State: Solid
Melting Point: Decomposes when heated above 160 deg C (320 deg F) (10,13)
Boiling Point: Not applicable
Relative Density (Specific Gravity): 1.5 (water = 1)
Solubility in Water: Very soluble in cold water (40 g/100 mL at 0 deg C) and hot water (30-34 g/100 mL at 100 deg C (13)
Solubility in Other Liquids: Slightly soluble in ethanol (1,13)
Coefficient of Oil/Water Distribution (Partition Coefficient): Not available
pH Value: Near neutral; pH 7.0-8.0 at 20 deg C (5% solution); pH 7.0-8.5 at 20 deg C (1M solution) (14)
Vapour Density: Not applicable
Vapour Pressure: Not available. Probably does not form a vapour.
Saturation Vapour Concentration: Not applicable
Evaporation Rate: Not applicable

SECTION 10. STABILITY AND REACTIVITY

Stability:
Normally stable. Decomposes when heated above 160 deg C (320 deg F) to form acetone and calcium carbonate.(10)

Hazardous Polymerization:
Will not occur

Incompatibility - Materials to Avoid:

NOTE: Chemical reactions that could result in a hazardous situation (e.g. generation of flammable or toxic chemicals, fire or detonation) are listed here. Many of these reactions can be done safely if specific control measures (e.g. cooling of the reaction) are in place. Although not intended to be complete, an overview of important reactions involving common chemicals is provided to assist in the development of safe work practices.


STRONG ACIDS - can react vigorously and decompose calcium acetate to produce acetic acid fumes.

Hazardous Decomposition Products:
None known

Conditions to Avoid:
Static charge, sparks, heat and other ignition sources, generation of dust.

Corrosivity to Metals:
Very mildly corrosive to most metals.(12)


SECTION 11. TOXICOLOGICAL INFORMATION

LD50 (oral, rat): 4280 mg/kg (6)


SECTION 16. OTHER INFORMATION

Selected Bibliography:
(1) Hawley's condensed chemical dictionary. 12th edition. Van Nostrand Reinhold, 1993. p. 200
(2) Toxicological evaluation of some food additives including anticaking agents, antimicrobials, antioxidants, emulsifiers and thickening agents. (WHO Food Additives Series, No. 5). World Health Organization, 1974. p. 31-33
(3) Documentation of the threshold limit values and biological exposure indices. 5th edition. ACGIH, 1986. p. 445
(4) Wright, G.W. The pulmonary effects of inhaled inorganic dust. In: Patty's industrial hygiene and toxicology. 4th edition. Vol. 1, Part A. John Wiley & Sons, 1994. p. 307-309
(5) Kasprzak, K.S., et al. Effects of calcium(II) and magnesium(II) on nickel(II) uptake and stimulation of thymidine incorporation into DNA in the lungs of strain A mice. Carcinogenesis. Vol. 6, issue 12 (1985). p. 1819-1821
(6) Smyth, H.F., et al. Range-finding toxicity data : list VII. American Industrial Hygiene Association Journal. Vol. 30 (Sept.-Oct. 1969). p. 470-476
(7) Grossel, S.S. Safety considerations in conveying of bulk solids and powders. Journal of Loss Prevention in the Process Industries. Vol. 1 (April, 1988). p. 62-74
(8) Field, P. Explosibility assessment of industrial powders and dusts. Building Research Establishment, 1983
(9) The Sigma-Aldrich library of chemical safety data. Edition II. Vol. 1. Sigma-Aldrich, 1988. p. 665C
(10) The Merck index: an encyclopedia of chemicals, drugs, and biologicals. 11th edition. Merck & Co., Inc., 1989. p. 250
(11) Schwab, R.F. Dusts. In: Fire protection handbook. Edited by A.E. Cote. 18th edition. National Fire Protection Association, 1991. p. 4-174 to 4-181
(12) Corrosion data survey: metals section. 6th edition. NACE Publication, 1985. p. 28-29
(13) CRC handbook of chemistry and physics. 64th edition. CRC Press, Inc., 1983. p. B-78
(14) Fluka chemika-biochemika 1993/94. Fluka Chemie AG, 1993. p. 268
(15) Occupational Safety and Health Administration (OSHA). Metal and Metalloid Particulates in Workplace Atmospheres (Atomic Absorption). In: OSHA Analytical Methods Manual. Revision Date: Oct. 31, 2001. Available at:
<www.osha-slc.gov/dts/sltc/methods/toc.html>
(16) National Institute for Occupational Safety and Health (NIOSH). CALCIUM and compounds, as Ca. In: NIOSH Manual of Analytical Methods (NMAM(R)). 4th ed. Edited by M.E. Cassinelli, et al. DHHS (NIOSH) Publication 94-113. Aug. 1994. Available at: <www.cdc.gov/niosh/nmam/nmammenu.html>
(17) National Institute for Occupational Safety and Health (NIOSH). Particulates Not Otherwise Regulated, Total. In: NIOSH Manual of Analytical Methods (NMAM(R)). 4th ed. Edited by M.E. Cassinelli, et al. DHHS (NIOSH) Publication 94-113. Aug. 1994. Available at: <www.cdc.gov/niosh/nmam/nmammenu.html>
(18) National Institute for Occupational Safety and Health (NIOSH). Particulates Not Otherwise Regulated, Respirable. In: NIOSH Manual of Analytical Methods (NMAM(R)). 4th ed. Edited by M.E. Cassinelli, et al. DHHS (NIOSH) Publication 94-113. Aug. 1994. Available at: <www.cdc.gov/niosh/nmam/nmammenu.html>

Information on chemicals reviewed in the CHEMINFO database is drawn from a number of publicly available sources. A list of general references used to compile CHEMINFO records is available in the database Help.


Review/Preparation Date: 1995-01-23

Revision Indicators:
TDG 1996-06-01
US Transport 1996-06-01
Sampling 1996-06-01
EU class 1996-06-01
Bibliography 2005-03-25
Sampling/analysis 2005-03-25
LFL/LEL 2006-10-04
UFL/UEL 2006-10-04
Emergency overview 2006-10-04



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