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4-METHOXYPHENOL ICSC: 1097
Date of Peer Review: October 2004

Hydroquinone monomethyl ether
Mequinol
p-Hydroxyanisole
CAS # 150-76-5 C7H8O2 / OH(C6H4)OCH3
RTECS # SL7700000 Molecular mass: 124.1
UN #
EC Index # 604-044-00-7
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible.
NO open flames.
Powder, alcohol-resistant foam, water spray, carbon dioxide.
EXPLOSION Finely dispersed particles form explosive mixtures in air.
Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.

EXPOSURE
PREVENT DISPERSION OF DUST!

Inhalation
Local exhaust or breathing protection.
Fresh air, rest.
Skin Redness. Burning sensation. Pain.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness. Pain.
Safety goggles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion
Do not eat, drink, or smoke during work.
Rinse mouth. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Sweep spilled substance into sealable containers. Carefully collect remainder, then remove to safe place. Personal protection: P2 filter respirator for harmful particles.
EU Classification
Symbol: Xn
R: 22-36-43
S: (2-)-24/25-26-37/39-46
UN Classification

EMERGENCY RESPONSE STORAGE
NFPA Code: H2; F1; R0;
Separated from strong oxidants, strong bases, acid anhydrides, acid chlorides.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
4-METHOXYPHENOL ICSC: 1097
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE TO TAN SOLID IN VARIOUS FORMS, WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
Dust explosion possible if in powder or granular form, mixed with air.

CHEMICAL DANGERS:
Reacts with strong oxidants, strong bases, acid anhydrides and acid chlorides. The solution in water is a weak acid.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 mg/m as TWA; (ACGIH 2004).
MAK not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by ingestion.

INHALATION RISK:
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes and the skin.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the skin, resulting in depigmentation.
PHYSICAL PROPERTIES
Boiling point: 243C
Melting point: 57C
Density: 1.6 g/cm
Solubility in water, g/100 ml at 25C: 4
Relative vapour density (air = 1): 4.3
Flash point: 132C o.c.
Auto-ignition temperature: 421C
Octanol/water partition coefficient as log Pow: 1.58
ENVIRONMENTAL DATA

NOTES
Do NOT take working clothes home.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005