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MSDS for POTASSIUM HYDROXIDE Page 1

1 - PRODUCT IDENTIFICATION

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PRODUCT NAME: POTASSIUM HYDROXIDE

FORMULA: KOH

FORMULA WT: 56.11

CAS NO.: 01310-58-3

NIOSH/RTECS NO.: TT2100000

COMMON SYNONYMS: POTASSIUM HYDRATE

PRODUCT CODES: 3141,3150,3146,3147,5342,3142,5085,3140

EFFECTIVE: 01/22/87

REVISION #03

PRECAUTIONARY LABELLING

BAKER SAF-T-DATA(TM) SYSTEM

HEALTH - 3 SEVERE (POISON)

FLAMMABILITY - 0 NONE

REACTIVITY - 2 MODERATE

CONTACT - 4 EXTREME (CORROSIVE)

HAZARD RATINGS ARE 0 TO 4 (0 = NO HAZARD; 4 = EXTREME HAZARD).

LABORATORY PROTECTIVE EQUIPMENT

GOGGLES; LAB COAT; VENT HOOD; PROPER GLOVES

PRECAUTIONARY LABEL STATEMENTS

POISON DANGER

CAUSES SEVERE BURNS

MAY BE FATAL IF SWALLOWED

DO NOT GET IN EYES, ON SKIN, ON CLOTHING. AVOID SPATTERING BY SLOWLY

ADDING TO SOLUTION.

AVOID BREATHING DUST. KEEP IN TIGHTLY CLOSED CONTAINER. USE WITH ADEQUATE

VENTILATION. WASH THOROUGHLY AFTER HANDLING.

SAF-T-DATA(TM) STORAGE COLOR CODE: WHITE STRIPE (STORE SEPARATELY)

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2 - HAZARDOUS COMPONENTS

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COMPONENT % CAS NO.

POTASSIUM HYDROXIDE 85-100 1310-58-3

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3 - PHYSICAL DATA

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BOILING POINT: 1320 C ( 2408 F) VAPOR PRESSURE(MM HG): N/A

MELTING POINT: 360 C ( 680 F) VAPOR DENSITY(AIR=1): N/A

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MSDS for POTASSIUM HYDROXIDE Page 2

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SPECIFIC GRAVITY: 2.04 EVAPORATION RATE: N/A

(H2O=1) (BUTYL ACETATE=1)

SOLUBILITY(H2O): APPRECIABLE (MORE THAN 10 %) % VOLATILES BY VOLUME: 0

APPEARANCE & ODOR: WHITE OR SLIGHTLY YELLOW PELLETS; NO ODOR.

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4 - FIRE AND EXPLOSION HAZARD DATA

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FLASH POINT (CLOSED CUP N/A NFPA 704M RATING: 3-0-1

FLAMMABLE LIMITS: UPPER - N/A % LOWER - N/A %

FIRE EXTINGUISHING MEDIA

USE EXTINGUISHING MEDIA APPROPRIATE FOR SURROUNDING FIRE.

UNUSUAL FIRE & EXPLOSION HAZARDS

A VIOLENT EXOTHERMIC REACTION OCCURS WITH WATER. SUFFICIENT HEAT

MAY BE PRODUCED TO IGNITE COMBUSTIBLE MATERIALS.

REACTS WITH MOST METALS TO PRODUCE HYDROGEN GAS, WHICH CAN FORM AN

EXPLOSIVE MIXTURE WITH AIR.

TOXIC GASES PRODUCED

HYDROGEN GAS

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5 - HEALTH HAZARD DATA

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TLV LISTED DENOTES CEILING LIMIT.

THRESHOLD LIMIT VALUE (TLV/TWA): 2 MG/M3 ( PPM)

TOXICITY: LD50 (ORAL-RAT)(MG/KG) - 365

CARCINOGENICITY: NTP: NO IARC: NO Z LIST: NO OSHA REG: NO

EFFECTS OF OVEREXPOSURE

CONTACT WITH SKIN OR EYES MAY CAUSE SEVERE IRRITATION OR BURNS.

EXCESSIVE INHALATION OF DUST IS IRRITATING AND MAY BE SEVERELY DAMAGING

TO RESPIRATORY PASSAGES AND/OR LUNGS.

INGESTION MAY CAUSE SEVERE BURNING OF MOUTH AND STOMACH.

TARGET ORGANS

EYES, SKIN

MEDICAL CONDITIONS GENERALLY AGGRAVATED BY EXPOSURE

NONE IDENTIFIED

ROUTES OF ENTRY

EYE CONTACT, SKIN CONTACT, INHALATION, INGESTION

EMERGENCY AND FIRST AID PROCEDURES

CALL A PHYSICIAN.

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MSDS for POTASSIUM HYDROXIDE Page 3

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IF SWALLOWED, DO NOT INDUCE VOMITING; IF CONSCIOUS, GIVE LARGE AMOUNTS OF

WATER. FOLLOW WITH DILUTED VINEGAR, FRUIT JUICE OR WHITES OF EGGS, BEATEN

WITH WATER.

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 OR SKIN WITH PLENTY OF WATER FOR

AT LEAST 15 MINUTES WHILE REMOVING CONTAMINATED CLOTHING AND SHOES.

WASH CLOTHING BEFORE RE-USE.

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6 - REACTIVITY DATA

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STABILITY: STABLE HAZARDOUS POLYMERIZATION: WILL NOT OCCUR

CONDITIONS TO AVOID: MOISTURE, HEAT

INCOMPATIBLES: WATER, STRONG ACIDS, ORGANIC MATERIALS, ZINC, ALUMINUM

DECOMPOSITION PRODUCTS: HYDROGEN

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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.

J. T. BAKER NEUTRACIT-2(R) CAUSTIC NEUTRALIZER IS RECOMMENDED

FOR SPILLS OF THIS PRODUCT.

DISPOSAL PROCEDURE

DISPOSE IN ACCORDANCE WITH ALL APPLICABLE FEDERAL, STATE, AND LOCAL

ENVIRONMENTAL REGULATIONS.

EPA HAZARDOUS WASTE NUMBER: D002, D003 (CORROSIVE, REACTIVE WASTE)

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8 - PROTECTIVE EQUIPMENT

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VENTILATION: USE GENERAL OR LOCAL EXHAUST VENTILATION TO MEET

TLV REQUIREMENTS.

RESPIRATORY PROTECTION: A RESPIRATOR WITH DUST/MIST FILTER IS RECOMMENDED.

IF AIRBORNE CONCENTRATION EXCEEDS TLV, A SELF-

CONTAINED BREATHING APPARATUS IS ADVISED.

EYE/SKIN PROTECTION: SAFETY GOGGLES, UNIFORM, APRON, NEOPRENE GLOVES

ARE RECOMMENDED.

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9 - STORAGE AND HANDLING PRECAUTIONS

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MSDS for POTASSIUM HYDROXIDE Page 4

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SAF-T-DATA(TM) STORAGE COLOR CODE: WHITE STRIPE (STORE SEPARATELY)

SPECIAL PRECAUTIONS

KEEP CONTAINER TIGHTLY CLOSED. STORE IN CORROSION-PROOF AREA.

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10 - TRANSPORTATION DATA AND ADDITIONAL INFORMATION

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DOMESTIC (D.O.T.)

PROPER SHIPPING NAME POTASSIUM HYDROXIDE, DRY SOLID

HAZARD CLASS CORROSIVE MATERIAL (SOLID)

UN/NA UN1813

LABELS CORROSIVE

REPORTABLE QUANTITY 1000 LBS.

INTERNATIONAL (I.M.O.)

PROPER SHIPPING NAME POTASSIUM HYDROXIDE, DRY SOLID

HAZARD CLASS 8

UN/NA UN1813

LABELS CORROSIVE