Yellow orange crystalline solid.

Hazards (solid)

Oxidiser - Contact with combustible material may cause fire. Harmful if taken internally, resulting in internal damage and irritation. Long continued absorption can cause liver and kidney disease. Avoid inhaling dust, this irritates the respiratory tract and may cause ulceration, particularly of the nasal septum.

Avoid contact with skin and eyes, which may produce dermatitis, ulceration and/or internal damage.

LDLO (child)- 50 mg/Kg TLV (as CrO3) - 0.05 mg/m3

Fire risk

No risk form solution, but solid is a powerful oxidising agent, readily supporting combustion and supplying oxygen. Fires should be flooded with water.

Handling

Store in a dry cool environment in sealed containers, away from other chemicals and combustible materials. Handle solid with face mask, gloves and overalls. Handle solutions with skin protection (gloves), goggles and overalls.

Spillage

Run solution to waste with extensive dilution of running water. It is advisable to check with local authorities as to the level of chromium permitted in the effluent both for spillage and development of sensitised gravure products after transfer. Do not allow to dry out; remove contaminated clothing. Dichromates may be reduced to chromium III compounds which are less hazardous. An addition of sulphite is used for reduction followed by precipitation using lime, or caustic soda, to yield hydrated chromic oxide.

First Aid

Inhalation: Remove to safe area, loosen clothing, check breathing. Administer AR if necessary, or oxygen. Call a physician and give details of chemical.

Eyes: irrigate thorougly with clear water for at least 10 minutes moving eyelid and eyeball. Seek medical attention.

Skin: Wash with cold water for at least 10 minutes, use soap if necessary. Remove contaminated clothing. For symptoms relating to repeated exposure, consult medical advice.

Ingestion: Wash out mouth with large quanties of water - do not swallow. If swallowed, give large quantities of milk or water to dilute in stomach. Do not induce vomiting but hospitalise patient immediately with information to doctor on chemical and quantity involved.

After sensitising, the BOD is in the region of 0.44 mg 02/mg emulsion. The chromium level is in the region of 1.0g/m2. Obviously exposed (insolubilised) resists reduce the availability of chromium to all affluent.