Sodium hydride

CAS Number
7646-69-7
EC Number
231-587-3
Abbreviation
NaH

What is Sodium hydride?

Sodium hydride (CAS 7646-69-7), commonly abbreviated as NaH, is a strong inorganic base used in chemical synthesis and industrial processing.

Where is Sodium hydride used?

  • Pharmaceutical synthesis: deprotonating agent for N- and O-alkylation of active pharmaceutical ingredient precursors
  • Polymer and rubber production: initiator for anionic polymerization and synthesis of flame-retardant intermediates
  • Biotechnology and fine chemical workflows: generation of reactive carbanions and enolates in multi-step synthetic routes
  • Catalyst precursor in reactions requiring a highly reactive, non-nucleophilic base
  • It enables alkylation, condensation, and cyclization reactions that require highly basic conditions.

Good to know: These steps are often difficult to achieve with milder bases. The 60% NaH concentration is the standard commercial form that balances handling safety with reactivity.

Commercial specifications

  • 60% NaH concentration
  • Pure, dry NaH for solvent-free conditions
  • Technical grade; packaging from small quantities to bulk drums

Other Names (Synonyms)

23J3BHR95O|Sodium hydride (NaH)|Sodium monohydride|NaH|Sodium Hydrogen.

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What are the physical properties of Sodium hydride?

Melting Point 800 °C (decomp)
Density 0.92 g/cm³
Flash Point 185°C
Appearance Grey solid
Color White to pale gray
Form powder (moistened with oil)
Water Solubility REACTS

Which trade and regulatory codes apply to Sodium hydride?

HS Code 28500090
UN Number 1427
ADR Class 4.3
Packing Group I
WGK (Germany) 3
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