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Date of Issue : OCT 1993 1. IDENTIFICATION
General Product Name : HYDROQUINONE Other Names : 1,4-BENZENEDIOL; p-DIHYDROXYBENZENE; HYDROQUINOL QUINOL; TECQUINOL UN No. : 2662 Dangerous Goods Class : 61b Subsidiary Risk : Hazchem Code : 2Z Pack Group : III EPG : 6B3 Poisons Schedule : 6 Uses : As a photographic reducer and developer, dye intermediate, inhibitor of polymerisation, antioxidant for fats and oils, and as a stabiliser in paints and varnishes, motor fuels and oils.
1.1 Physical Description / Properties
Appearance : Colourless or white needle crystals. Odourless.� 鼿ygroscopic Formula : C6H4(OH)2 Boiling Point : 285 deg C Melting Point : 170 deg C Vapour Pressure : N/A Specific Gravity : 1.33 (water = 1) Flash Point : Closed Cup 169 pH : () Solubility in water : 72 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
Soluble in 14 parts water, freely soluble in alcohol, ether, slightly soluble in benzene. Its solution becomes brown in air due to oxidation; the oxidation is very rapid in the presence of alkali. 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
Harmful if swallowed. Material is irritating to the mucous membranes. Oral LD50 = 70mg/kg (Cat), 200 mg/kg (Dog), 320 mg/kg (Rat) Eye
Frequent or prolonged exposure to dust or fumes is moderately irritative and may cause damage to the eyes. Skin
Harmful if absorbed through the skin. Moderately toxic. Moderately irritative. Dermal LD50 = Not available Inhaled
Harmful if inhaled. Exposure to dust or fumes is moderately irritative to the respiratory tract (including mucous membranes, throat and lungs). Inhalation LC50 = Not available 2.2 Health Effects - Chronic
Prolonged exposure can cause damage to the eyes.
2.3 First Aid
Swallowed
Contact a Doctor or the Immediately IF CONSCIOUS (Do not give anything by mouth to unconscious patient) Give 1 - 3 cups of water Induce vomiting (Ipecac syrup or stimulate throat with finger) Immediately transport to a hospital or doctor
Eye
Flood eyes with clean water for 15 minutes - retract eyelids often Immediately transport to a hospital or doctor
Skin
Remove all contaminated clothing including footwear Wash affected areas thoroughly with mild soap and water If condition persists immediately transport to a hospital or doctor
Inhaled
Remove from contaminated area immediately; avoid becoming casualty If NOT breathing apply artificial resuscitation, preferably mouth-to-mouth Experienced person may administer Oxygen if breathing is difficult Immediately transport to a hospital or doctor
First Aid Facilities
2.5 Advice to Doctor
Not available
2.6 Toxicity Data
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
TLV-TWA Air: 2 mg/m3 TLV:STEL:4 mg/m3
3.2 Engineering Controls
Provide general exhaust ventilation
3.3 Personal Protection
Ensure an eye bath and safety shower are available. Safety goggles All-purpose canister respirator Butyl rubber gloves and boots Cotton overalls to protect skin and clothing Avoid prolonged or repeated exposures. Wash contaminated clothing before re-use. Wash thoroughly after use and before eating, drinking smoking or going to the toilet.
3.4 Flammability
Keep away from ignition and heat sources (NO SMOKING) Ventilation is required to prevent a dust explosion SAFE HANDLING INFORMATION
4.1 Storage / Transport
Transport or store in cool shaded position. Separate by > 12m if transporting , or D.G. Class 5.1 Material (Oxidising Agents) D.G. Class 5.2 Materials (Organic Peroxides). D.G. Class 8 Materials (Corrosives) Transport or store away from ignition sources
4.2 Packaging / Labelling UN No. 2662 Class 61b Sun Risk Hazchem Code 2Z Pack Group III EPG No. 6B3 Shipping Name HYDROQUINONE Hazard
Risk Phrases
Safety Phrases
4.3 Spills and Disposal
Spills
Avoid raising dust. Eliminate flammables. Eliminate all ignition sources (NO SMOKING)
Disposal
Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber.
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
May burn if ignited or heated. Explosive upon heating. May cause oxidisable materials to burn/explode. Dust may form an explosive mixture in air. Violent reaction with sodium hydroxide.
Extinguishing Media
Evacuate area - move upwind of fire Summon Fire Brigade immediately, dial 000 Water spray, carbon dioxide, dry chemical powder, alcohol or polymer foam. Use equipment/media appropriate to surrounding conditions. 5 OTHER INFORMATION
Other Information
Not available
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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