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1 - PRODUCT IDENTIFICATION
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PRODUCT NAME: HYDROQUINONE
FORMULA: 1,4-(HO)2C6H4
FORMULA WT: 110.11
CAS NO.: 123-31-9
NIOSH/RTECS NO.: MX3500000
COMMON SYNONYMS: DIHYDROQUINONE; 1,4-DIHYDROXYBENZENE; QUINOL
PRODUCT CODES: N449
EFFECTIVE: 08/29/86
REVISION #02
PRECAUTIONARY LABELLING
BAKER SAF-T-DATA(TM) SYSTEM
HEALTH - 2 MODERATE
FLAMMABILITY - 1 SLIGHT
REACTIVITY - 1 SLIGHT
CONTACT - 2 MODERATE
HAZARD RATINGS ARE 0 TO 4 (0 = NO HAZARD; 4 = EXTREME HAZARD).
LABORATORY PROTECTIVE EQUIPMENT
SAFETY GLASSES; LAB COAT; VENT HOOD; PROPER GLOVES
PRECAUTIONARY LABEL STATEMENTS
WARNING
MAY BE FATAL IF SWALLOWED
CAUSES IRRITATION
AVOID CONTACT WITH EYES, SKIN, CLOTHING.
KEEP IN TIGHTLY CLOSED CONTAINER. WASH THOROUGHLY AFTER HANDLING.
SAF-T-DATA(TM) STORAGE COLOR CODE: ORANGE (GENERAL STORAGE)
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2 - HAZARDOUS COMPONENTS
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COMPONENT % CAS NO.
HYDROQUINONE 90-100 123-31-9
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3 - PHYSICAL DATA
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BOILING POINT: 285 C ( 545 F) VAPOR PRESSURE(MM HG): N/A
MELTING POINT: 170 C ( 338 F) VAPOR DENSITY(AIR=1): 3.81
SPECIFIC GRAVITY: 1.33 EVAPORATION RATE: N/A
(H2O=1) (BUTYL ACETATE=1)
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SOLUBILITY(H2O): MODERATE (1 TO 10 %) % VOLATILES BY VOLUME: 0
APPEARANCE & ODOR: WHITE NEEDLE-LIKE, ODORLESS CRYSTALS.
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4 - FIRE AND EXPLOSION HAZARD DATA
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FLASH POINT (CLOSED CUP 165 C ( 329 F) NFPA 704M RATING: 2-1-0
FLAMMABLE LIMITS: UPPER - N/A % LOWER - N/A %
FIRE EXTINGUISHING MEDIA
USE EXTINGUISHING MEDIA APPROPRIATE FOR SURROUNDING FIRE.
SPECIAL FIRE-FIGHTING PROCEDURES
FIREFIGHTERS SHOULD WEAR PROPER PROTECTIVE EQUIPMENT AND SELF-CONTAINED
BREATHING APPARATUS WITH FULL FACEPIECE OPERATED IN POSITIVE PRESSURE MODE.
UNUSUAL FIRE & EXPLOSION HAZARDS
DUST MAY FORM EXPLOSIVE MIXTURE WITH AIR.
TOXIC GASES PRODUCED
CARBON MONOXIDE, CARBON DIOXIDE
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5 - HEALTH HAZARD DATA
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THRESHOLD LIMIT VALUE (TLV/TWA): 2 MG/M3 ( PPM)
SHORT-TERM EXPOSURE LIMIT (STEL): 4 MG/M3 ( PPM)
PERMISSIBLE EXPOSURE LIMIT (PEL): 2 MG/M3 ( PPM)
TOXICITY: LD50 (ORAL-RAT)(MG/KG) - 320
LD50 (IPR-RAT)(MG/KG) - 170
LD50 (IV-RAT) (MG/KG) - 115
LD50 (SCU-MOUSE)(MG/KG) - 190
CARCINOGENICITY: NTP: NO IARC: NO Z LIST: NO OSHA REG: NO
EFFECTS OF OVEREXPOSURE
INGESTION IS HARMFUL AND MAY BE FATAL.
DUST MAY CAUSE HEADACHE, COUGHING, DIZZINESS OR DIFFICULT BREATHING.
CONTACT WITH SKIN OR EYES MAY CAUSE IRRITATION.
INGESTION MAY CAUSE NAUSEA, VOMITING AND LOSS OF CONSCIOUSNESS.
TARGET ORGANS
EYES, SKIN, RESPIRATORY SYSTEM, CENTRAL NERVOUS SYSTEM
MEDICAL CONDITIONS GENERALLY AGGRAVATED BY EXPOSURE
NONE IDENTIFIED
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ROUTES OF ENTRY
INHALATION, INGESTION, EYE CONTACT, SKIN CONTACT
EMERGENCY AND FIRST AID PROCEDURES
CALL A PHYSICIAN.
IF SWALLOWED, IF CONSCIOUS, IMMEDIATELY INDUCE VOMITING.
IF INHALED, REMOVE TO FRESH AIR. IF NOT BREATHING, GIVE ARTIFICIAL
RESPIRATION. IF BREATHING IS DIFFICULT, GIVE OXYGEN.
IN CASE OF CONTACT, IMMEDIATELY FLUSH EYES WITH PLENTY OF WATER FOR AT
LEAST 15 MINUTES. FLUSH SKIN WITH WATER.
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6 - REACTIVITY DATA
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STABILITY: STABLE HAZARDOUS POLYMERIZATION: WILL NOT OCCUR
CONDITIONS TO AVOID: HEAT, FLAME, OTHER SOURCES OF IGNITION, AIR, LIGHT
INCOMPATIBLES: STRONG OXIDIZING AGENTS, ALKALIES
DECOMPOSITION PRODUCTS: CARBON MONOXIDE, CARBON DIOXIDE
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7 - SPILL AND DISPOSAL PROCEDURES
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STEPS TO BE TAKEN IN THE EVENT OF A SPILL OR DISCHARGE
WEAR SELF-CONTAINED BREATHING APPARATUS AND FULL PROTECTIVE CLOTHING.
WITH CLEAN SHOVEL, CAREFULLY PLACE MATERIAL INTO CLEAN, DRY CONTAINER AND
COVER; REMOVE FROM AREA. FLUSH SPILL AREA WITH WATER.
DISPOSAL PROCEDURE
DISPOSE IN ACCORDANCE WITH ALL APPLICABLE FEDERAL, STATE, AND LOCAL
ENVIRONMENTAL REGULATIONS.
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8 - PROTECTIVE EQUIPMENT
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VENTILATION: USE GENERAL OR LOCAL EXHAUST VENTILATION TO MEET
TLV REQUIREMENTS.
RESPIRATORY PROTECTION: RESPIRATORY PROTECTION REQUIRED IF AIRBORNE
CONCENTRATION EXCEEDS TLV. AT CONCENTRATIONS UP
TO 20 PPM, A HIGH-EFFICIENCY PARTICULATE
RESPIRATOR IS RECOMMENDED. ABOVE THIS LEVEL, A
SELF-CONTAINED BREATHING APPARATUS IS ADVISED.
EYE/SKIN PROTECTION: SAFETY GLASSES WITH SIDESHIELDS, UNIFORM, PROPER
GLOVES ARE RECOMMENDED.
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9 - STORAGE AND HANDLING PRECAUTIONS
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SAF-T-DATA(TM) STORAGE COLOR CODE: ORANGE (GENERAL STORAGE)
SPECIAL PRECAUTIONS
KEEP CONTAINER TIGHTLY CLOSED. SUITABLE FOR ANY GENERAL CHEMICAL STORAGE
AREA.
STORE IN LIGHT-RESISTANT CONTAINERS.
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10 - TRANSPORTATION DATA AND ADDITIONAL INFORMATION
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DOMESTIC (D.O.T.)
PROPER SHIPPING NAME CHEMICALS, N.O.S. (NON-REGULATED)
INTERNATIONAL (I.M.O.)
PROPER SHIPPING NAME HYDROQUINONE
HAZARD CLASS 6.1
UN/NA UN2662
LABELS HARMFUL - STOW AWAY FROM FOOD STUFFS
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