Sodium hydride

Formula
NaH
Structure
Description
A silvery to whitish powder or slurry in oil.
Uses
Condensing or alkylating agent, especially for amines, descaling metals.

Registry Numbers and Inventories.
CAS
7646-69-7
EC (EINECS/ELINCS)
231-587-3
EC Index Number
001-003-00-X
EC Class
Highly flammable
S 7/8 24/25 43
RTECS
WB3910000
UN (DOT)
1427
Merck
12,8770
Beilstein/Gmelin
13704 (G)
Swiss Giftliste 1
G-7043
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
HNa
Formula mass
23.99
Melting point, °C
630 - 634
Density
1.34 - 1.42 g/cm3 (21 C)
Solubility in water
Decomposes
Thermal expansion
0.0000604/K

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
Do not use water. Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Keep material dry.
Stability
No data.
Incompatibilities
Attacks SiO2 in glass Reacts with sulfur to give Na2S and H2S Can react explosively with dimethyl sulfoxide React vigorously with acetylene, even at -60C Spontaneously flammable in fluorine Reaction with dimethylformamide, when heated, runs away.
Decomposition
Flammable solid that decomposes violently in water.

Fire.
Fire fighting
Do not use water. Do not use dry chemical or carbon dioxide.
Fire potential
FLAMMABLE.
Hazards
MAY EXPLODE ON CONTACT WITH WATER. Accidental contact with water used to extinguish surrounding fire will result in the release of hydrogen gas and possible explosion.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
3
 
 
Reactivity
2
 
 
Special
W

Health.
Poison_Class
2
Exposure effects
   Ingestion
Burns of the esophagus and less commonly the stomach may occur after caustic ingestion; the absence of oral mucosal injury does not reliably exclude esophageal burns. Patients with stridor, drooling or vomiting are more likely to have esophageal burns.
   Inhalation
Stridor, dyspnea, upper airway injury, and pulmonary edema, especially following inhalation of vaporized caustics, may occur.
   Skin
Severe skin irritation and/or burns may occur.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Do NOT induce vomiting; neutralize alkali in stomach by drinking dilute vinegar, lemon juice, or orange juice; call a physician.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. In case of contact with substance, wipe from skin immediately. Flush with running water for at least 20 minutes.
   Eyes
Flush with running water for at least 20 minutes.

Transport.
UN number
1427
Response guide
Hazard class
4.3
Packing Group
I
 
USCG CHRIS Code
SDH
 
Std. Transport #
4916454