A

Aspirin

IUPAC: 2-acetyloxybenzoic acid

C9H8O4 Organic Compounds CAS 50-78-2
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Quick Reference
Formula / NotationC9H8O4
CAS Number50-78-2
Molecular Weight180.16
Melting Point275 °F (NTP, 1992)
Boiling Point284 °F at 760 mmHg (decomposes) (NTP, 1992)
Density1.4 (NTP, 1992) - Denser than water; will sink
Solubilityless than 1 mg/mL at 73 °F (NTP, 1992)
AppearanceAcetylsalicylic acid appears as odorless white crystals or crystalline powder with a slightly bitter taste. (NTP, 1992)
Also Known As2-acetyloxybenzoic acid; ACETYLSALICYLIC ACID; 50-78-2; 2-Acetoxybenzoic acid; 2-(Acetyloxy)benzoic acid; Acylpyrin; O-Acetylsalicylic acid; o-Acetoxybenzoic acid; Acenterine; Acetophen
CategoryOrganic Compounds

What is Aspirin?

Aspirin can cause developmental toxicity and female reproductive toxicity according to an independent committee of scientific and health experts.

Formula & Notation

C9H8O4

IUPAC Name: 2-acetyloxybenzoic acid

Other Names / Synonyms: 2-acetyloxybenzoic acid; ACETYLSALICYLIC ACID; 50-78-2; 2-Acetoxybenzoic acid; 2-(Acetyloxy)benzoic acid; Acylpyrin; O-Acetylsalicylic acid; o-Acetoxybenzoic acid; Acenterine; Acetophen

Properties & Characteristics

Appearance: Acetylsalicylic acid appears as odorless white crystals or crystalline powder with a slightly bitter taste. (NTP, 1992). Molecular formula: C9H8O4. Molecular weight: 180.16 g/mol. Boiling point: 284 °F at 760 mmHg (decomposes) (NTP, 1992). Melting point: 275 °F (NTP, 1992). Density: 1.4 (NTP, 1992) - Denser than water; will sink. Solubility: less than 1 mg/mL at 73 °F (NTP, 1992). Vapor pressure: 0 mmHg (approx) (NIOSH, 2024). LogP: 1.2.

Physical Data

PropertyValue
Melting Point275 °F (NTP, 1992)
Boiling Point284 °F at 760 mmHg (decomposes) (NTP, 1992)
Density1.4 (NTP, 1992) - Denser than water; will sink
Molecular Weight180.16
Solubilityless than 1 mg/mL at 73 °F (NTP, 1992)
AppearanceAcetylsalicylic acid appears as odorless white crystals or crystalline powder with a slightly bitter taste. (NTP, 1992)

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Aspirin
Formula C9H8O4
CAS Number 50-78-2
Molecular Weight 180.16
Category Organic Compounds
Index All "A" terms
Synonyms 2-acetyloxybenzoic acid; ACETYLSALICYLIC ACID; 50-78-2; 2-Acetoxybenzoic acid; 2-(Acetyloxy)benzoic acid; Acylpyrin; O-Acetylsalicylic acid; o-Acetoxybenzoic acid; Acenterine; Acetophen

Frequently Asked Questions

Aspirin can cause developmental toxicity and female reproductive toxicity according to an independent committee of scientific and health experts.

More "A" Terms

4-Aminobenzoic acid C7H7NO2 Absolute Entropy of a Substance S° Absolute Zero 0 K = −273.15°C Absorption Spectrum E = hν; A = εlc Accuracy Acenaphthene C12H10 Acetaldehyde C2H4O Acetic Acid CH₃COOH (C₂H₄O₂) Acetic anhydride C4H6O3 Acetone C3H6O Acetonitrile C2H3N Acetophenone C8H8O
View all "A" terms →
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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.

AllChemicals.info — The Online Chemical Glossary | https://allchemicals.info/chemical/aspirin

For educational purposes only. Verify all information before use.