Ammonium Bicarbonate - Powder

Ammonium Bicarbonate - Powder

CAS Number:1066‑33‑7

Synonyms:Ammonium bicarbonate; Baking ammonia; Hartshorn; E503

Chemical Formula:NH₄HCO₃

Molecular Weight:79.06 g/mol

Product Introduction

A white crystalline powder with a faint ammonia odor. A volatile salt that decomposes into CO₂, NH₃, and H₂O upon heating. Used as a leavening agent, pop-corn and cracker baking, food additive, lab reagent, and buffer for protein digestion and lyophilization

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Physical & Chemical Properties

Property Value
Appearance White crystalline powder/glossy crystals
Odor Faint ammonia
Density ~1.586 g/cm³
Melting / Decomposition 36–42 °C (decomposes)
Solubility in Water ~21.6 g/100 mL @ 20 °C
Solubility in Organics Insoluble in ethanol, methanol, acetone
Vapor Pressure ~435 Torr (~580 mmHg) @ 25 °C
pH (5% soln) ~7.8–8.0

Applications

  • Food: leavening agent for crackers, cookies, flatbreads; decomposes cleanly with no residue
  • Laboratory: buffer for lyophilization, trypsin digestion, proteomics, MALDI MS
  • Industrial: fire extinguisher additives, fertilizer, baking powder manufacturing

Safety & Handling

  • Low toxicity; dust can irritate. Upon decomposition releases ammonia and CO₂. Nonflammable. Store sealed in cool, dry place. Use dust PPE. GHS: H302 (oral irritant). LD₅₀ ~1,576 mg/kg (rat)

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