Educational content for trained professionals. Not a Safety Data Sheet, not medical advice. In an emergency, call your local poison control or emergency services immediately. Terms of use.
4-Chlorobenzoic Acid
Also known as: 4-Chlorobenzoic acid · 74-11-3 · P-CHLOROBENZOIC ACID · Benzoic acid, 4-chloro-
- CAS No.
- 74-11-3
- Formula
- C7H5ClO2
- Molar mass
- 156.56 g/mol
- PubChem CID
- 6318
Toxic
Harmful / Irritant
Environmental hazard
Summary
4-Chlorobenzoic Acid (C7H5ClO2), CAS 74-11-3. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.
Background
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Hazards
May be fatal even in small doses.
May cause skin, eye or respiratory irritation.
Toxic to aquatic organisms.
Hazard statements
- H301
- H302: Harmful if swallowed [Warning Acute toxicity, oral]
- H315: Causes skin irritation [Warning Skin corrosion/irritation]
- H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure
- H411
Storage
Keep at room temperature, below 30 °C, out of direct heat.
Store somewhere well-ventilated and away from any ignition source.
Metal drums or tinted glass, tightly sealed.
Strong acids, strong bases and powerful oxidizers.
Personal protective equipment
Nitrile or butyl, at least 0.4 mm thick.
Safety goggles with side shields.
A2 organic-vapor cartridge if the room isn't well ventilated.
Occupational exposure limits (HSE)
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EU harmonised classification (ECHA C&L)
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Transport
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FDA recalls & enforcement
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Compatibilities
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Open comparator with 4-Chlorobenzoic AcidPractical safety notes
- Acute toxicity. Work under a fume hood, restrict access, keep a specific antidote plan available.
- Irritant / harmful. Ventilate the workspace and avoid skin contact.
- Environmental hazard. Do not release to sewers or waterways; collect for hazardous waste disposal.
Derived from the GHS classification shown above. These notes are generic guidance and do not replace the manufacturer's SDS or your local risk assessment.
FAQ
Is 4-Chlorobenzoic Acid flammable?+
4-Chlorobenzoic Acid (CAS 74-11-3) does not carry the GHS02 flame pictogram in our records. Always confirm with the manufacturer's SDS section 9 (flash point) before assuming a product is non-flammable.
What PPE should I wear when handling 4-Chlorobenzoic Acid?+
Safety glasses with side shields and nitrile gloves are the baseline. Work inside a fume hood or use a suitable respirator. Check SDS section 8 for material-specific breakthrough times.
How should 4-Chlorobenzoic Acid be stored?+
Store 4-Chlorobenzoic Acid (CAS 74-11-3) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials.
Is 4-Chlorobenzoic Acid dangerous for the environment?+
Yes. 4-Chlorobenzoic Acid carries the GHS09 environment pictogram. Do not release to drains, soil or waterways; collect residues for hazardous-waste disposal in line with local regulations.
Where can I find the official Safety Data Sheet for 4-Chlorobenzoic Acid?+
Official, up-to-date SDS documents are published by each manufacturer (Sigma-Aldrich, Merck, Thermo Fisher, VWR, Carl Roth, etc.) and by regulators such as ECHA and NIOSH. This page is an educational summary and does not replace the manufacturer's SDS.
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