Sulphuric Acid

General

    Synonyms: oil of vitriol, mattling acid, vitriol, battery acid, dipping acid, electrolyte acid, vitriol brown oil, sulphuric acid
    Molecular formula: H2SO4
    CAS No: 7664-93-9
    EC No: 231-639-5
    EC index No: 016-020-00-8

Physical data

    Appearance: Colourless oily liquid
    Melting point: -2 C
    Boiling point: 327 C
    Specific gravity: 1.84
    Vapour pressure: <0.3 mm Hg at 20 C (vapour density 3.4)
    Flash point:
    Explosion limits:
    Autoignition temperature:
    Water solubility: miscible in all proportions

Stability

    Stable, but reacts with moisture very exothermically, which may enhance its ability to act as an oxidizing agent. Substances to be avoided include water, most common metals, organic materials, strong reducing agents, combustible materials, bases, oxidising agents. Reacts violently with water - when diluting concentrated acid, carefully and slowly add acid to water, not the reverse. Reaction with many metals is rapid or violent, and generates hydrogen (flammable, explosion hazard).

Toxicology

Extremely corrosive, causes serious burns. Highly toxic. Harmful by inhalation, ingestion and through skin contact. Ingestion may be fatal. Skin contact can lead to extensive and severe burns. Chronic exposure may result in lung damage and possibly cancer.

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