Safety (MSDS) data for acetylsalicylic acid  

Safety (MSDS) data for acetylsalicylic acid

Hazard: harmful

Click here for data on acetylsalicylic acid in student-friendly format, from the HSci project


    Synonyms: aspirin, 2-(acetyloxy)benzoic acid, acetyl salicylic acid, O-acetylsalicylic acid, acetol, acetophen, A.S.A., ASA, acenterine, acetosal, 2-acetoxybenzoic acid, entrophen, rodine, numerous further trade names
    Use: analgesic, antipyretic
    Molecular formula: C9H8O4
    CAS No: 50-78-2
    EC No:

Physical data

    Appearance: white crystalline powder or tablets
    Melting point: 138 - 140 C
    Boiling point: ca. 140 C (decomposes)
    Specific gravity: 1.4
    Vapour pressure:
    Flash point:
    Explosion limits:
    Autoignition temperature: 490 C
    Water solubility: slight


    Stable. Keep dry. Incompatible with strong oxidizing agents, strong bases, strong acids, various other compounds such as iodides, iron salts, quinine salts, etc.


    Harmful if swallowed in quantity. Skin, eye and respiratory irritant. May act as an allergen in susceptible people.

    Toxicity data
    (The meaning of any abbreviations which appear in this section is given here.)
    ORL-CHD LDLO 104 mg kg-1
    ORL-RAT LD50 200 mg kg-1
    SKN-RBT LD50 > 7940 mg kg-1
    ORL-MAM LD50 1750 mg kg-1
    ORL-MAN TDLO 1625 mg kg-1

    Risk phrases
    (The meaning of any risk phrases which appear in this section is given here.)
    R22 R36 R37 R38.

Transport information

    (The meaning of any UN hazard codes which appear in this section is given here.)
    Un No 2811. Packing group III. Hazard class 6.1.

Personal protection

    Safety glasses.

    Safety phrases
    (The meaning of any safety phrases which appear in this section is given here.)
    S26 S27 S28 S36 S37 S39 S45.

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This information was last updated on September 27, 2005. Although we have tried to make it as accurate and useful as possible, we can take no responsibility for its use or misuse.
{Origin ref no: 50}