International Chemical Safety Cards

HYDROQUINONE ICSC: 0166

HYDROQUINONE
1,4-Dihydroxybenzene
Hydroquinol
Quinol
C6H6O2
Molecular mass: 110.1
CAS # 123-31-9
RTECS # MX3500000
ICSC # 0166
UN # 2662
EC # 604-005-00-4
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Combustible.
NO open flames.
Powder, water spray, foam, 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! AVOID ALL CONTACT!

  • INHALATION
    		• Cough. Laboured breathing.
    		Local exhaust or breathing protection.
    		Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.
  • SKIN
    		• Redness.
    		Protective clothing.
    		Remove contaminated clothes. Rinse and then wash skin with water and soap.
  • EYES
    		• Redness. Pain. Blurred vision.
    		Safety goggles.
    		First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
  • INGESTION
    		• Blue skin. Dizziness. Headache. Nausea. Shortness of breath. Convulsions. Vomiting. Ringing in the ears.
    		Do not eat, drink, or smoke during work. Wash hands before eating.
    		Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.
    SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
    Sweep spilled substance into sealable containers. Carefully collect remainder, then remove to safe place (extra personal protection: P2 filter respirator for harmful particles).
    		Separated from strong bases, food and feedstuffs.
    		Do not transport with food and feedstuffs.
    Xn symbol
    R: 20/22
    S: 2-24/25-39
    UN Hazard Class: 6.1
    UN Packing Group: III
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 0166 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993 No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and IDLH values.

    International Chemical Safety Cards

    HYDROQUINONE ICSC: 0166

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    PHYSICAL STATE; APPEARANCE:
     COLOURLESS CRYSTALS.

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

    CHEMICAL DANGERS:
     Reacts violently with sodium hydroxide.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
     TLV: ppm; 2 mg/m3 (ACGIH 1992-1993).
    OSHA PEL: TWA 2 mg/m3
    NIOSH REL: C 2 mg/m3 15-minute
    NIOSH IDLH: 50 mg/m3


    		ROUTES OF EXPOSURE:
     The substance can be absorbed into the body by inhalation, through the skin and 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 20°C.

    EFFECTS OF SHORT-TERM EXPOSURE:
     The substance irritates the eyes, the skin and the respiratory tract. Exposure by ingestion may result in respiratory failure.

    EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
     Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the eyes and skin , resulting in discolouration of the conjunctiva and cornea and skin depigmentation. May cause genetic damage in humans.
    PHYSICAL
    PROPERTIES
    Boiling point: 287°C
    Melting point: 172°C
    Relative density (water = 1): 1.3
    Solubility in water, g/100 ml at 15°C: 5.9
    Vapour pressure, Pa at 20°C: 0.12
    		 Relative vapour density (air = 1): 3.8
    Relative density of the vapour/air-mixture at 20°C (air = 1): 1
    Flash point: 165°C
    Auto-ignition temperature: 515°C
    Octanol/water partition coefficient as log Pow: 0.59
    ENVIRONMENTAL
    DATA
         		This substance may be hazardous to the environment; special attention should be given to water organisms.
    NOTES
    Depending on the degree of exposure, periodic medical examination is indicated. No odour warning if toxic concentrations are present. Black & White Bleaching Cream, Diak 5, Eldopaque, Eldoquin, Tecquinol, Tenox HQ are trade names.
    Transport Emergency Card: TEC (R)-61G12c
    NFPA Code: H2; F1; R0;
    ADDITIONAL INFORMATION


    ICSC: 0166 HYDROQUINONE
    © IPCS, CEC, 1993
    IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and IDLH values.