Product Identification

Product Name

1,3-Dihydroxy-5-methylbenzene

Synonyms

5-Methylresorcinol
1,5-Dihydroxy-3-methylbenzene
3,5-Dihydroxytoluene
3-Hydroxy-5-methylphenol
5-Methyl-1,3-benzenediol
5-Methylbenzene-1,3-diol

CAS

504-15-4

Formula

C7H8O2

Molecular Weight

124.14

EINECS

207-984-2

RTECS

VH2100000

RTECS Class

Other

Merck

12,6995

Beilstein/Gmelin

1071903

Beilstein Reference

4-06-00-05892

Physical and Chemical Properties

Appearance

Off-white crystals.

Solubility in water

Slightly soluble

Melting Point

109

Boiling Point

289 - 290

Vapor Pressure

0.0012 (25 C)

Density

1.2895 g/cm3

pKa/pKb

9.52 (pKa)

Partition Coefficient

1.22

Heat Of Vaporization

55.1 kJ/mol

Heat Of Combustion

-3453 kJ/mol

Usage

Used as a a reagent for pentoses, lignin, beet sugar, saccharoses, arabinose, diastase.

Refractive Index

1.5403

First Aid Measures

Ingestion

Get medical aid. If conscious drink water, then induce vomiting. If unconscious, immediately take victim to a physician and do NOT attempt to induce vomiting. Wash mouth out with water.

Inhalation

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.

Skin

Get medical aid if irritation develops or persists. Wash clothing before reuse. 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.

Handling and Storage

Storage

Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light and air. Store under an inert atmosphere.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Store protected from light. Handle under an inert atmosphere. Store protected from air.

Hazards Identification

Ingestion

May cause irritation of the digestive tract. May be harmful if swallowed. Ingestion may cause convulsions, seizures and possible coma.

Inhalation

Causes respiratory tract irritation. Causes irritation of the mucous membrane.

Skin

Causes skin irritation.

Eyes

Causes eye irritation. May cause eye injury.

EC Risk Phrase

R 22 36/37/38

EC Safety Phrase

S 26 36

UN (DOT)

2811

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.

Fire Fighting Measures

Flash Point

144

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 extinguishing media most appropriate for the surrounding fire. In case of fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation. Place under an inert atmosphere.

Stability and Reactivity

Disposal Code

3

Incompatibilities

Air, strong oxidizing agents, acid chlorides, acid anhydrides.

Stability

Stable under normal temperatures and pressures. Substance may discolor on exposure to light.

Decomposition

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

Transport Information

UN Number

2811

HS Code

2907 29 00