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Date of Issue : Dec 1998 1. IDENTIFICATION
General Product Name : COBALT CHLORIDE HEXAHYDRATE Other Names : COBALT CHLORIDE HEXAHYDRATE UN No. : N/A Dangerous Goods Class : None Allocated Subsidiary Risk : None Allocated Hazchem Code : N/A Pack Group : 0 EPG : N/A Poisons Schedule : N/A Uses :
1.1 Physical Description / Properties
Appearance : Purple crystals, odourless. Formula : CoCl2.6H2O Boiling Point : N/A deg C Melting Point : 318 deg C Vapour Pressure : N/A Specific Gravity : 1.92 (water = 1) Flash Point : N/A pH : N/A () Solubility in water : 215 g/l (25 deg C) Flammability Limits (as percentage volume in air) Lower Explosion Limit : N/A Upper Explosion Limit : N/A 1.2 Other Properties
Decomposes at 318 deg C into Co3O4 and Cl2 gas. 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
Ingestion of significant amounts of cobalt has been reported to have the potential for causing blood, heart, thyroid and pancreas damage. Eye
May cause eye irritation to sensitive persons. Skin
Possibility of skin allergic reactions in sensitive persons. Inhaled
Inhalation may cause an irritation of respiratory organs of sensitive persons resulting in obstruction of airways with shortness of breath. 2.2 Health Effects - Chronic
Prolonged inntion of dust, fume or mist containing cobalt may cause serious respiratory illness. Inhalation may cause obstruction of the airways with shortness of breath for sensitive persons. "Interstitial fibrosis, a disease which can be fatal has been observed in workers exposed to high concentrations of dust containing cobalt in combination with tungsten, iron etc. mainly in the cemented carbides and the diamond polishing industries." Ref : Mutagenicity, carcinogenicity and teratogenicity of Co metal and cobalt compounds (A Leonard and R Lauwerys, Mutation Research, 239 (1990) 17-27).
2.3 First Aid
Swallowed
In case of ingestion and if conscious, induce vomiting. Contact a physician.
Eye
Flush thoroughly with water, including under eyelids. If irritation occurs, contact a physician.
Skin
Wash thoroughly with soap and water. If irritation occurs, contact a physician.
Inhaled
In case of inhalation of cobalt dust, mior fume, remove from exposure. If breathing is difficult, administer oxygen by trained/qualified personnel. Obtain medical attention.
First Aid Facilities
Ensure an eye bath and safety shower are available and ready for use.
2.5 Advice to Doctor
Treat symptomatically based on judgement of doctor and individual reactions of patient.
2.6 Toxicity Data
Oral LD50 = 766 mg/kg (Rat) - harmful by ingestion Dermal LD50 = > 2000 mg/kg (Rat) (RCC NOTOX Study nr 1073/1335 October 1998) Inhalation LC50 = in an attempt to determine the LC50, it failed as it was not possible to obtain an inhalable form of the commercial product by grinding.
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
The following exposure standard is recommended by Worksafe : Cobalt, metal dust & fume (as Co) : TWA 0.05 mg/m3 - Sensitiser
3.2 Engineering Controls
Proper ventilation should be installed in order to maintain dust concentration in the air below the occupational exposure limit. Use only with adequate local exhaust ventilation. Periodic air quality testing is needed to insure adherence to acceptable limits.
3.3 Personal Protection
Use an appropriate and approved respirator if airborne dust concentration exceeds the occupational exposure limit. A respirator loses its effectiveness when worn with a beard. Wear suitable gloves, safety glasses of face shield in operations that scatter fine particles in the air. Wear other protective work clothes to minimise exposure. Work clothes should be worn for a one day period only. Workers in flame- or spark-generating operations should, in addition, wear work clothes made of fire-retardant materials. Practice good housekeeping and personal hygiene procedures. No eating, drinking or smoking in work area. Wash hands and face thoroughly befroe eating, drinking or smoking. Avoid ingestion, inhalation and skin or eye contact. Allergic or hypersensitive persons should not be allowed on jobs involving the exposure to cobalt. Periodic medical examinations are recommended for individuals regularly exposed to dust, fume or mist. Failure to practice good industrial hygiene increases the risk of contracting a cobalt-related lung disease.
3.4 Flammability
Not flammable SAFE HANDLING INFORMATION
4.1 Storage / Transport
Avoid dampness in storage. Keep drums sealed; artly used drums should be resealed. Otherwise no special precautions needed for handling and storing in unopened container.
4.2 Packaging / Labelling UN No. N/A Class None Allocated Sub Risk None Allocated Hazchem Code N/A Pack Group 0 EPG No. N/A Shipping Name COBALT CHLORIDE HEXAHYDRATE Hazard HARMFUL
Risk Phrases R22 Harmful if swallowed. R42/43 May cause sensitisation by inhalation and skin contact.
Safety Phrases S24 Avoid contact with skin. S37 Wear suitable gloves.
4.3 Spills and Disposal
Spills
Clean-up personnel should wear protective clothing including an approved respirator for dusts. Prevent the substance from entering into surface waters.
The spill should first be confined and the area should be cleaned by wet sweeping or vacuum cleaning. In case of water contamination, precipitate with CaOH-lime. Wet cleaning is to be avoided as the chloride is soluble. Vacuum- cleaners should have high efficiency particulate air filters (HEPA).
Disposal
Dispose of in accordance with all Local, State and Federal regulations at an approved waste disposal facility.
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Material is stable under normal circumstances. Avoid temperatures above 318 degrees C. CoCl2 decomposes at high temperatures (> 318 deg C) into stable Co3O4 or CoO and generates chlorine and hydrogen chloride (HCl) gas. Hazardous polymerisation has not been reported.
Extinguishing Media
Fire-fighters should wear full protective clothing including self-contained breathing apparatus suitable for HCl/Cl gas. In case of fire use dry powder, carbon dioxide or water. If water is used, the obtained CoCl2 solution has to be neutralised, using lime which will precipitate out the Co. 5 OTHER INFORMATION
Other Information
Ecotoxicity : Algae : IC50 (72h) : 23.8 mg/l (no standard test species) (Shomara et al 1987) Daphnia magna : EC50 (48h) : 1.52 mg/l (no GLP) (Khangerot & Roy, 1987) Fish : LC50 (96h) : no data Ozone depletion potential : this material does not contain ozone depleting substances.
5.1 Contact Points
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The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use.
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