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Date of Issue : Oct 1998 1. IDENTIFICATION
General Product Name : AMMONIUM THIOCYANATE Other Names : AMMONIUM SULPHOCYANIDE; AMMONIUM SULPHOCYANATE AMMONIUM RHODANIDE ; THIOCYANIC ACID AMMONIUM SALT 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 : 5 Uses : Analytical chemistry; chemicals (thioures); fertilisers; photography; ingredients of freezing solutions, especially liquid rocket propellants; fabric dyeing; zinc coating; weed killer and defoliant; adhesives; curing resins; pickling iron and steel; electroplating; temporary soil steriliser; polymerisation catalyst; separator of zirconium and hafnium, gold and iron.
1.1 Physical Description / Properties
Appearance : Colourless deliquescent crystals, odourless. Formula : NH4SCN Boiling Point : Dec deg C Melting Point : 149 deg C Vapour Pressure : N/A Specific Gravity : 1.306 (water = 1) Flash Point : N/A pH : 5 (5% in water) Solubility in water : 1860 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
Material decomposes at 170 deg C. Freely soluble in water, alcohol, acetone, and ammonia. 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
Causes gastrointestinal irritation with nausea, vomiting and diarrhoea. May cause agitation, delerium, convulsions and muscle spasms. Eye
May cause eye irritation. Skin
Harmful if absorbed through the skin. Chronic exposure may cause thyroid damage : thyroid enlargement, decrease in metabolic rate, and hypothyroidism. Inhaled
Causes respiratory tract irritation. 2.2 Health Effects - Chronic
Chronic exposure may cause thyroid damage : thyroid enlargement, decrease in metabolic rate, and hypothyroidism.
2.3 First Aid
Swallowed
Rinse mouth. Give water to drink. Induce vomiting. Never induce vomiting in unconscious or confused persons. Seek medical advice.
Eye
Rinse thoroughly with plenty of water. Eyelids should be held away from the eyeball to ensure thorough rinsing. Seek medical advice if irritation persists.
Skin
Remove all contaminated clothing immediately. Wash off with plenty of soap and water. Seek medical advice if irritation develops. Launder clothes before reuse.
Inhaled
Not likely to occur. Avoid breathing dust. Seek medical advice after significant exposure.
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 = 750 mg/kg (Rat) ; 500 mg/kg (Mouse) Dermal LD50 = not available Inhalation LC50 = not available Irritation : skin - non-irritating eye - mildly irritating Sensitisation : skin - not sensitising Genotoxicity : Ames Test : not mutagenic
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
An exposure standard has not been established for this material by Worksafe .
3.2 Engineering Controls
Provide adequate ventilation to maintain airborne concentrations below applicable workplace standards, including local exhaust ventilation.
3.3 Personal Protection
In case of dust formation use dust mask. Wear suitable gloves, eye/face protection and other general industrial clothing to minimise exposure. Wash hands and face thoroughly after handling and before work breaks, eating, drinking, smoking and using toilet facilities.
3.4 Flammability
Material will not burn. SAFE HANDLING INFORMATION
4.1 Storage / Transport
Avoid dust generation. Use only in well-ventilated areas. Keep containers tightly closed and in a well-ventilated place (cool, dry and dark). Keep away from acids and oxidants.
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 AMMONIUM THIOCYANATE Hazard HARMFUL
Risk Phrases R20/21/22 Harmful by inhalation, in contact with skin and if swallowed. R32 Contact with acids liberates very toxic gas.
Safety Phrases S2 Keep out of reach of children. S13 Keep away from food, drink and animal feeding stuffs.
4.3 Spills and Disposal
Spills
Avoid raising dust. Clean-up personnel should wear full protective clothing including breathing apparatus.
Collect as mush as possible in a clean container for (preferable) reuse or disposal. To clean the floor and all objects contaminated by this material, use soap and water.
Disposal
Dispose of in accordance with all Local, State and Federal regulations at an approved waste disposal facility (most probably by controlled incineration).
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Material will not burn or explode. May cause oxidisable materials to burn or explode. When heated to decomposition it emits toxic fumes of H2S, HCN, NH3, CS2, COS, CO, NOx and SO2. Contact with acids liberates toxic gas. Stable under recommended storage and handling conditions. Reaction with strong acids, and strong oxidising agents. Avoid contact with metals.
Extinguishing Media
Fire-fighters should wear full protective clothing including self-contained breathing apparatus. In case of fire use (preferably) water. DO NOT use dry powder type extinguishers. Use equipment/media appropriate to surrounding fire conditions. 5 OTHER INFORMATION
Other Information
Ecotoxicity Fish : No Observed Effect Concentration (NOEC) : 100 mg/l (Oncorhynchus mykiss) Bacteria : EC10 = 8 g/l (Pseudomonas putida) Fate Degradation Biotic : Biodegradable
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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