Sodium hydride manufacturers and suppliers

Sodium hydride suppliers

Properties

Melting point:: 800 °C (dec.) (lit.)

Density: 1.2

Flash point:: 185°C

storage temp.: Store below +30°C.

solubility: Soluble in molten sodium. Insoluble in ammonia, benzene,carbon tetrachloride, carbon disulfide and all organic solvents.

form: powder (moistened with oil)

color: White to pale gray

Water Solubility: REACTS

Sensitive: Air & Moisture Sensitive

Merck: 14,8625

Exposure limits: ACGIH: TWA 5 mg/m3
OSHA: TWA 5 mg/m3
NIOSH: IDLH 2500 mg/m3; TWA 5 mg/m3; STEL 10 mg/m3

CAS DataBase Reference: 7646-69-7(CAS DataBase Reference)

NIST Chemistry Reference: Sodium hydride(7646-69-7)

EPA Substance Registry System: Sodium hydride (NaH) (7646-69-7)

Safety Information

Symbol(GHS): GHS02,GHS05

Signal word: Danger

Hazard statements: H228-H260-H290-H314

Precautionary statements: P210-P231+P232-P260-P280-P303+P361+P353-P305+P351+P338

Hazard Codes: F,C

Risk Statements: 15-36-35-11

Safety Statements: 26-43-7/8-43A-24/25-7-60-22-45-37/39-16

RIDADR: UN 1427 4.3/PG 1

WGK Germany: 3

RTECS: WB3910000

F: 10-21

TSCA: Yes

HazardClass: 4.3

PackingGroup: I

HS Code: 28500090

Hazardous Substances Data: 7646-69-7(Hazardous Substances Data)

Use

Sodium hydride belongs to ionic crystals, salt compounds in which the hydrogen is negative monovalent ions. When heating, it is unstable, decomposition without melting, hydrolysis reaction of sodium hydride with water to prepare sodium hydroxide and hydrogen. Pure sodium hydride is silver needle-like crystals, commercially available sodium hydride merchandise usually is subtle gray crystalline powder, the proportion of sodium hydride is 25% to 50% dispersed in oil. The relative density is 0.92. Sodium hydride is crystalline rock salt type structure (lattice constant a = 0.488nm), and as lithium hydride in ionic crystalline, hydrogen ion is existent in anion form. Heat of formation is 69.5kJ mol-1, at the high temperature of 800 ℃, it decomposes into metallic sodium and hydrogen; decomposes explosively in water; reacts violently with lower alcohols;dissolves in molten sodium and molten sodium hydroxide; insoluble in liquid ammonia, benzene, carbon tetrachloride and carbon disulfide.

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