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Sodium hydride

Physical properties Related chemical reaction Uses Preparation Flammability hazard characteristics Storage Characteristics
Sodium hydride
Sodium hydride structure
CAS No.
7646-69-7
Chemical Name:
Sodium hydride
Synonyms
340F;nah80;NAH 80;0.84-0.86;Hydridesodium;SODIUM HYDRIDE;sodiummonohydride;sodiumhydride(nah);sodiumhydride[nah];Sodium hydride (NaH)
CBNumber:
CB1111738
Molecular Formula:
HNa
Formula Weight:
24
MOL File:
7646-69-7.mol

Sodium hydride Properties

Melting point:
800 °C (dec.)(lit.)
Density 
1.2
Flash point:
185°C
storage temp. 
Store at RT.
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
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
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
  • NFPA
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
10-21
TSCA  Yes
HazardClass  4.3
PackingGroup  I
HS Code  28500090
Hazardous Substances Data 7646-69-7(Hazardous Substances Data)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H228 Flammable solid Flammable solids Category 1
Category 2
Danger
Warning
P210, P240,P241, P280, P370+P378
H260 In contact with water releases flammable gases which may ignite spontaneously Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases Category 1 Danger P223, P231+P232, P280, P335+ P334,P370+P378, P402+P404, P501
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P223 Keep away from any possible contact with water, because of violent reaction and possible flash fire.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P231+P232 Handle under inert gas. Protect from moisture.
P335+P334 Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages.
P370+P378 In case of fire: Use … for extinction.
P422 Store contents under …
P402+P404 Store in a dry place. Store in a closed container.

NFPA 704

Diamond Hazard Value Description
3
3 2
W
Health   3 Short exposure could cause serious temporary or moderate residual injury (e.g. liquid hydrogen, sulfuric acid, calcium hypochlorite, hexafluorosilicic acid)
Flammability   3 Liquids and solids (including finely divided suspended solids) that can be ignited under almost all ambient temperature conditions . Liquids having a flash point below 22.8 °C (73 °F) and having a boiling point at or above 37.8 °C (100 °F) or having a flash point between 22.8 and 37.8 °C (73 and 100 °F). (e.g. gasoline, acetone)
Instability   2 Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water (e.g. white phosphorus, potassium, sodium)
Special   W

(NFPA, 2010)

Sodium hydride price More Price(22)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 223441 Sodium hydride dry, 90% 7646-69-7 10g $47.2 2018-11-13 Buy
Sigma-Aldrich 223441 Sodium hydride dry, 90% 7646-69-7 1kg $1590 2018-11-13 Buy
TCI Chemical S0481 Sodium Hydride (60%, dispersion in Paraffin Liquid) 7646-69-7 100g $46 2018-11-22 Buy
TCI Chemical S0481 Sodium Hydride (60%, dispersion in Paraffin Liquid) 7646-69-7 500g $97 2018-11-22 Buy
Alfa Aesar H36490 Sodium hydride, ca 60% dispersion in oil, in solvent solublebags 7646-69-7 100g $45.8 2018-11-13 Buy

Sodium hydride Chemical Properties,Uses,Production

Physical properties

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.

Related chemical reaction

Sodium hydride is a strong reducing agent, For example, titanium tetrachloride can reduced to metallic titanium at 400 ℃: TiCl4 == 4NaH + Ti + 4NaCl + 2H2.
At atmospheric pressure and heated to 425 ℃, it decomposes to generate hydrogen gas. And it can violently react with water, even causes a fire, and produces sodium hydroxide and hydrogen. It reacts with liquild ammonia to prepare amine salt (sodium amide) and hydrogen. NaH + NH3-(H2) → NaNH2 + H2.
At a high temperature, sodium hydride also reacts with halogen, sulfur vapor, sulfur dioxide and carbon dioxide. It is highly reductive, liberates the metal from metal oxides, metal chlorides.
TiCl4 + 4NaH → Ti + NaCl + 2H2.
Sodium hydride reacts with boron trifluoride to generate diborane.
2BF3 + 6NaH → B2H6 + 6NaF.
Sodium hydride is stable in dry air below 230 ℃, over this temperature it will burn into sodium oxide. If there is the presence of trace amounts of sodium, even at low temperatures it is also easy to fire. When firing, water and organic fire extinguishing agent must not be used.

Uses

Sodium hydride can be used for condensation and alkylation reaction and can be used as a polymerization catalyst, used for the manufacture of drug synthetic and used in fragrance industry, used for manufacturing boron hydrides, used as metal surface rust, reducing agents, condensing agent, desiccant and Clay Johnson's reagents.
Used as a condensing agent, an alkylating agent and a reducing agent, etc.
It is an important reductant for Pharmaceutical, perfumes, dyes, but also as a drying agent, an alkylating agent, etc.

Preparation

Sodium hydride is prepared by passing hydrogen gas into molten sodium metal dispersed in oil. Alternatively, the hydride can be made by passing hydrogen into sodium dispersed over the surface of an inert solid, such as, hydrocarbon above 200°C
2Na + H2 → 2NaH

Flammability hazard characteristics

Encountering Water or moist air to emit hydrogen and can be combustible

Storage Characteristics

Treasury ventilation low-temperature drying, stored separately from oxidants, halogens, strong acids.

Chemical Properties

Grey solid

Uses

At low temperatures where reducing properties of sodium are undesirable as in the condensation of ketones and aldehydes with acid esters; in solution with molten sodium hydroxide for the reduction of oxide scale on metals; at high temperatures as a reducing agent and reduction catalyst.

Definition

sodium hydride: A white crystallinesolid, NaH; cubic; r.d. 0.92; decomposesabove 300°C (slow);completely decomposed at 800°C.Sodium hydride is prepared by thereaction of pure dry hydrogen withsodium at 350°C. Electrolysis ofsodium hydride in molten LiCl/KClleads to the evolution of hydrogen;this is taken as evidence for the ionicnature of NaH and the presence ofthe hydride ion (H–). It reacts violentlywith water to give sodium hydroxideand hydrogen, with halogensto give the halide and appropriatehydrogen halide, and ignites spontaneouslywith oxygen at 230°C. It is apowerful reducing agent with severallaboratory applications.

General Description

A silvery to whitish powder or slurry in oil. Used to make other chemicals.

Air & Water Reactions

Highly flammable. Ignites or explodes in contact with air of high humidity [Bretherick 1979 p. 107]. Reacts violently with water producing a caustic solution (NaOH) and hydrogen (H2). Heat of reaction may ignite the hydrogen.

Reactivity Profile

Sodium hydride is a powerful reducing agent. Attacks SiO2 in glass. Ignites on contact with gaseous F2, Cl2, Br2, and I2 (the last at temperatures exceeding 100°C), especially in the presence of moisture, to form HF, HCl, HBr, and HI [Mellor 2:483 1946-47]. Reacts with sulfur to give Na2S and H2S [Bretherick 1979 p. 107]. Can react explosively with dimethyl sulfoxide [Chem. Eng. News 44(24):7 1966]. Reacts vigorously with acetylene, even at -60°C [Mellor 2:483 1946-47]. Spontaneously flammable in fluorine. Reaction with dimethylformamide, when heated, runs away [Chem. Eng. News, 1982, 60(28), 5]. Initiates a polymerization reaction in ethyl-2,2,3-trifluoropropionate such that the ester decomposed violently [Bretherick 5th ed. 1995]. Presence in the reaction of diethyl succinate and ethyl trifluoroacetate, has twice caused explosions [Chem. Brit., 1983, 19, 645].

Hazard

Dangerous fire risk, reacts violently with water evolving hydrogen. Irritant.

Health Hazard

SOLID: Will burn skin and eyes. Harmful if swallowed.

Fire Hazard

FLAMMABLE. 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.

Safety Profile

The powder ignites spontaneously in air. Flammable when exposed to heat or flame. Potentially explosive reaction with water, diethyl succinate + ethyltrifluoroacetate (above 60℃), dimethyl sulfoxide + heat, sulfur dioxide. Ignition or violent reaction with dimethylformamide (above 50℃), ethyl 2,2,3-trifluoropropionate, oxygen (at 230℃). Incompatible with acetylene + moisture, glycerin, halogens, sulphur. Normal fire extinguishers are unsuitable, use sand, ashes, solurn chloride. The commercial material may contain traces of sodium. When heated to decomposition it emits toxic fumes of Na2O. See also HYDRIDES.

Sodium hydride Preparation Products And Raw materials

Raw materials

Preparation Products


Sodium hydride Suppliers

Global( 218)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817
info@dakenchem.com CHINA 22064 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 20743 55
Shanghai Time Chemicals CO., Ltd.
+86-021-57951555
+86-021-57951555 jack.li@time-chemicals.com CHINA 1373 55
Mainchem Co., Ltd.
+86-0592-6210733
+86-0592-6210733 sales@mainchem.com CHINA 32606 55
Chemwill Asia Co.,Ltd.
86-21-51086038
86-21-51861608 chemwill_asia@126.com;sales@chemwill.com;chemwill@hotmail.com;chemwill@gmail.com CHINA 24093 58
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254
peter@hubeijusheng.com CHINA 20177 58
Haihang Industry Co.,Ltd
86-531-88032799
+86 531 8582 1093 export@haihangchem.com CHINA 4696 58
Hebei Chisure Biotechnology Co., Ltd.
+8613292893290
+8613292893290 Nancy@SpeedGainpharma.com CHINA 1027 58
Yancheng Green Chemicals Co.,Ltd
86-515-87883661
86-515-87883652 sales@greenchem-china.com CHINA 351 58
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 19975 58

View Lastest Price from Sodium hydride manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-19 Sodium hydride
7646-69-7
US $1.00 / kg 1kg 99% Customized career henan chemical co
2019-04-29 Sodium hydride
7646-69-7
US $10.00 / KG 1KG 99% 500tons/month Hebei Chisure Biotechnology Co., Ltd.

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