Product Identification

Product Name

4-Hydroxybenzenecarboxylic acid

Synonyms

4-Carboxyphenol
Paraben acid
p-Hydroxybenzoic acid
p-Salicylic acid

CAS

99-96-7

Formula

C7H6O3

Molecular Weight

138.12

EINECS

202-804-9

RTECS

DH1925000

RTECS Class

Drug

Merck

13,4837

Beilstein/Gmelin

970950

Beilstein Reference

4-10-00-00345

EC Class

irritant

Physical and Chemical Properties

Appearance

White to off-white.

Solubility in water

Very soluble

Melting Point

210 - 211

Boiling Point

336

Vapor Pressure

4E-5 (25 C)

Density

1.398 g/cm3

pKa/pKb

4.57 (pKa)

Partition Coefficient

1.58

Heat Of Vaporization

61.1 kJ/mol

Usage

Substance is used in org.

Vapor Density

1.46

Refractive Index

1.53

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.

Inhalation

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Skin

Get medical aid if irritation develops or persists. Flush skin with plenty of soap and water.

Eyes

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage

Store in a cool, dry place. Keep container closed when not in use.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

May cause irritation of the digestive tract. Ingestion of large amounts may cause systemic effects such as nausea, stomach pain, rapid breathing, sweating, convulsions, coma, cardiovascular collapse and possible death.

Inhalation

Dust is irritating to the respiratory tract. May cause effects similar to those described for ingestion.

Skin

May cause skin irritation.

Eyes

May cause severe eye irritation. May result in corneal injury.

EC Risk Phrase

R 36/37/38

EC Safety Phrase

S 26 36

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Poison Class

4

Fire Fighting Measures

Flash Point

171

Autoignition

250

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal.

Stability and Reactivity

Disposal Code

4

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Transport Information

HS Code

2918 29 30