Product Identification

Product Name

Hydroxytoluic acid

Synonyms

2-Hydroxy-3-methylbenzoic acid
3-Methylsalicylic acid
Benzoic acid, 2-hydroxy-3-methyl-
Cresotinic acid
Hydroxytoluic acid
o-Homosalicylic acid

CAS

83-40-9

Formula

C8H8O3

Molecular Weight

152.16

EINECS

201-473-8

RTECS

GP3920000

RTECS Class

Drug; Mutagen

Merck

13,2609

Beilstein/Gmelin

2086811

Beilstein Reference

4-10-00-00601

EC Class

harmful, irritant

Physical and Chemical Properties

Appearance

odorless white - pale pink powder

Solubility in water

Very soluble

Melting Point

163 - 165

Boiling Point

293

Vapor Pressure

0.0008 (25 C)

pKa/pKb

3.06 (pKa)

Partition Coefficient

-1.19

Heat Of Vaporization

56.3 kJ/mol

Heat Of Combustion

-3681 kJ/mol

Usage

Substance is used in production of dyes.

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.

Inhalation

Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.

Skin

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Eyes

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 tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

Harmful if swallowed.

Inhalation

May cause respiratory tract irritation.

Skin

May cause skin irritation.

Eyes

May cause eye irritation.

EC Risk Phrase

R 22 37/38 41

EC Safety Phrase

S 26 36/37/39

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 to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators

A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.

Poison Class

3

Fire Fighting Measures

Flash Point

145

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. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire, use carbon dioxide, dry chemical powder or appropriate foam.

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation. Cover with dry earth, dry sand, or other non-combustible material followed with plastic sheet to minimize spreading and contact with water.

Stability and Reactivity

Incompatibilities

Acid chlorides, acid anhydrides, strong bases, strong oxidizing agents.

Stability

Volatile in steam.

Decomposition

Carbon monoxide, carbon dioxide.

Transport Information

HS Code

2918 29 90