Lithium chromate

Formula
Li2CrO4
Structure
Description
A yellow crystalline solid.
Uses
Corrosion inhibitor for water cooled atomic reactors, soln as low temp heat transfer medium.

Registry Numbers and Inventories.
CAS
14307-35-8
EC (EINECS/ELINCS)
238-244-7
RTECS
GB2915000
RTECS class
Other
UN (DOT)
9134
Merck
12,5554
Beilstein/Gmelin
80467 (G)
RCRA
D007
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CrLi2O4
Formula mass
129.87
Melting point, °C
516
Vapor density (air=1)
5.72
Density
2.426 g/cm3 (25 C)
Solubility in water
Very soluble

Hazards and Protection.
Storage
Keep containers tightly closed in a well ventilated area away from food products. Keep away from heat and water.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3). Add soda ash (Na2CO3). Adjust pH to neutral (pH=7). Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Stability
Trivalent chromium is the most stable oxidation state and hexavalent chromium is the second most stable state.
Decomposition
When heated to decomposition it emits toxic fumes of lithium oxide.

Fire.
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)
Fire potential
Acts as an oxidizer.
Hazards
Some may burn but none ignite readily. May polymerize explosively when heated or involved in a fire. Containers may explode when heated. Some may be transported hot.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV: 0.025 ppm; 0.16 mg/m3 (ACGIH 1991-1992). NIOSH REL: Ca 0.001 mg Cr(VI)/m3 See Appendix A See Appendix C NIOSH IDLH: Potential occupational carcinogen
Carcinogin
G-A1, I-1, N-1, CP65
Exposure effects
Tremor, hyperreflexia, ataxia, slurred speech, lethargy, confusion, and cogwheel rigidity occur with mild to moderate intoxications. Agitation is common. Seizures and coma may develop with severe poisoning. Both trivalent and hexavalent chromium have been found to cross the placental barrier in hamsters and mice. Both were shown to enter the fetus during mid to late gestation. Developmental effects caused by both differed between hamster and mice. Fetal uptake of hexavalent chromium was much greater than that of the trivalent form. Effects on placental tissue could have also affected the fetus.
   Inhalation
Inhalation of material may be harmful.
   Skin
Deep perforating ulcers and hypersensitivity dermatitis may be noted. Systemic toxicity has resulted from minimal dermal exposure.
   Eyes
Photophobia has been reported following chronic lithium intoxication. Transitory blurred vision and blindness may occur.

First aid
 
   Ingestion
The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move to fresh air.
   Skin
Wash with large amounts of water then apply a paste of sodium bicarbonate.
   Eyes
Hold lids open and flush immediately with a slow stream of water. Continue for 10 to 15 minutes.

Transport.
UN number
9134
Response guide
Hazard class
9
USCG CHRIS Code
LCR
 
Std. Transport #
4962672