Sodium hydride represented by the chemical formula NaH or HNa  is a highly reactive inorganic ionic compound and a strong base. Due to its high reactivity, it is usually available as a gray solid dispersed in mineral oil that allows safe handling .
Sodium Hydride Identification
|CAS Number||7646-69-7 |
|PubChem CID||24758 |
|ChemSpider ID||23144 |
|EC Number||231-587-3 |
How to Make It
Sodium hydride can be prepared by a direct reaction between hydrogen gas and sodium metal .
2 Na + H2 = 2NaH
Properties and Characteristics of Sodium Hydride
|Molar mass/molecular weight||23.998 g/mol |
|Color/appearance||Silvery to whitish powder |
|Melting point/freezing point||800°C, 1472°F |
|Boiling point||N/A |
|Flash point||N/A |
|Density||1.396 g cm-3 |
|State of matter at room temperature (normal phase)||Solid |
|Solubility in water||Reacts |
|pH||>7 (basic) |
|Crystal structure||Octahedral |
NaH reacts violently with water to produce sodium hydroxide and hydrogen gas that gets ignited by the heat of the reaction .
NaH + H2O = NaOH + H2
Alcohols react with sodium hydride to produce alkoxide ions. In the below reaction, ethanol reacts with NaH forming sodium ethoxide and hydrogen .
CH3CH2OH + NaH = CH3CH2O–Na+ + H2
Similarly, methanol reacts with sodium hydride producing the sodium salt of methanol and hydrogen gas .
CH3OH + NaH = CH3ONa + H2
Sodium Hydride Uses
- As a powerful reducing and deprotonating agent for many organic reactions .
- As a desiccant or drying agent for lab chemicals .
- Its application as a hydrogen storage agent in fuel cell vehicles is being explored due to its ability to release hydrogen .
- As a strong base, it finds application in organic and inorganic fine chemical preparation .
Is It Dangerous
NaH is a severe irritant to eyes, skin and respiratory system causing burns and is harmful if ingested. It is a highly inflammable and corrosive compound. Precaution must be taken against an explosion hazard if it comes in contact with water [2, 7]. When it is heated to the point of decomposition, it emits highly poisonous fumes of oxides of sodium . After a reaction, unwanted sodium hydride should be destroyed by careful quenching or disposal .
- In spite of its high basicity, NaH is not nucleophilic .
Sodium Hydride (NaH) Price
It costs around $30-50 per kilogram. The price may vary with suppliers .
- Sodium Hydride (NaH) – Pubchem.ncbi.nlm.nih.gov
- Sodium hydride Formula – Sodium hydride Uses, Properties, Structure and Formula – Softschools.com
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- What is the reaction between sodium hydride and methanol? – Answers.yahoo.com
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- Sodium hydride price – Alibaba.com
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