MATERIAL SAFETY DATA SHEET
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NORAC
NOROX?MEKP-9
NORAC, INC.
Azusa, CA
SECTION 1 - IDENTIFICATION OF THE PRODUCT AND THE COMPANY
NOROX?MEKP-9
PRODUCT NAME
Norac, Inc. 800-424-9300
MANUFACTURER CHEMTREC (24hr) (USA)
DISTRIBUTED BY FREEMAN MFG & SUPPLY CO. 800-321-8511
Methyl Ethyl Ketone Peroxide (MEKP) See Section II
CHEMICAL NAME CAS NO.
Organic Peroxide - Ketone Peroxide Mixture
CHEMICAL FAMILY CHEMICAL FORMULA
SECTION 2 - COMPOSITION/INFORMATION ON INGREDIENTS
COMPONENTS CAS NO. %
Methyl Ethyl Ketone Peroxide 1338-23-4 34
Dimethyl Phthalate 131-11-3 43
2,2,4-Trimethyl-1,3-pentanediol diisobutyrate 6846-50-0 20
Hydrogen Peroxide 7722-84-1 01
Methyl Ethyl Ketone 78-93-3 02
Water 7732-18-5 01
SECTION 3 - HAZARD IDENTIFICATION OF THE PREPARATION
PHYSICAL HAZARDS Organic Peroxide. Decomposition
HEALTH HAZARDS Severe Irritant
The ACGIH Ceiling STEL is 1.5 mg/m3 (0.2 ppm) for Methyl Ethyl Ketone Peroxide.
EXPOSURE LIMITS
ROUTES OF EXPOSURE
Skin Contact Severe skin irritant, causes redness, blistering, and edema.
Eye Contact Eye contact causes severe corrosion and may cause blindness.
Ingestion Human systemic effects by ingestion: changes in structure or function of esophagus,
nausea, or vomiting, and other gastrointestinal effects.
Inhalation Moderately toxic by inhalation.
EFFECTS OF OVER-EXPOSURE Prolonged inhalation of vapors may cause mucous membrane irritation and vertigo.
There are no known medical conditions, which are recognized as being aggravated by
exposure.
SECTION 4 - FIRST-AID MEASURES
Skin Immediately remove any contaminated clothing. Wash contaminated area thoroughly
with soap and copious amounts of water for at least 15 minutes. If irritation or adverse
symptoms develop seek medical attention.
Eyes Remove any contact lenses at once. Flush eyes with water for at least 15 minutes.
Ensure adequate flushing by separating the eyelids with fingers. If irritation or adverse
symptoms develop seek medical attention.
Ingestion Do Not induce vomiting. Drink plenty of water. Immediately call a physician. For
aid to physician, suggest local Poison Control Center.
Inhalation Remove to fresh air, if coughing, breathing becomes labored, irritation develops or
other symptoms develop, seek medical attention at once, even if symptoms develop
several hours after the exposure.
SECTION 5 - FIRE-FIGHTING MEASURES
FLASH POINT >200篎 (93癈) C.O.C
FLAMMABLE LIMITS Unknown
AUTOIGNITION POINT Unknown
Revised on: 4/6/04 Printed On: 5/7/2004 Page 1 of 6
MATERIAL SAFETY DATA SHEET
NOROX?MEKP-9
EXTINGUISHING MEDIA Water from a safe distance - preferably with a fog nozzle. In case of very small fires,
other means such as carbon dioxide, foam or dry chemical extinguishers may be
effective. Dry chemical combined with MEKP formulations may re-ignite. Light
water additives may be particularly effective at extinguishing MEKP fires.
SPECIAL FIRE FIGHTING Firemen should be equipped with protective clothing and SCBA's. In case of fire near
PROCEDURES storage area, cool the containers with water spray. If dry chemical is used to
extinguish an MEKP fire, the extinguished area must be thoroughly wetted down with
water to prevent re-ignition.
UNUSUAL FIRE AND The heat of decomposition of the peroxides adds to the heat of the fire. Dry chemical
EXPLOSION HAZARDS fire extinguishing agent may catalyze the decomposition.
SECTION 6 - ACCIDENTAL RELEASE MEASURES
STEPS TO BE TAKEN IN Dike spill to prevent runoff from entering drains, sewers, streams, etc. Wet spilled
EVENT OF SPILL OR material with water and absorb with an inert absorbent material such as perlite,
RELEASE vermiculite, or sand. Sweep up using non-sparking tools and place in a clean
polyethylene drum or a polyethylene pail. DO NOT place into a steel container,
lined or unlined, as a decomposition may occur. Treat any contaminated cardboard
packaging as hazardous waste. Wet container contents with additional water prior to
sealing.
SECTION 7 - HANDLING AND STORAGE
HANDLING Rotate stock using the oldest material first. Avoid contact with skin, eyes and
clothing. Use PPE as specified in Section 8. Keep containers closed to prevent
contamination. Keep away from sources of heat, sparks or flame. Do not add to hot
solvents or monomers as a violent decomposition and/or reaction may result. When
using spray equipment, never spray raw MEKP onto curing or into raw resin or flues.
Keep MEKP in its original container. DO NOT USE NEAR FOOD OR DRINK.
Wash thoroughly after handling.
STORAGE The stability of MEKP formulations is directly related to the shipping and storage
temperature history. Cool storage at 80癋 or below is recommended for longer shelf
life and stability. Prolonged storage at elevated temperatures of 100癋 and higher will
cause product degradation, gassing and potential container rupture which can result in
a fire and/or explosion. Store out of direct sunlight in a well ventilated area away from
combustible and incompatible materials. DO NOT STORE WITH FOOD OR
DRINK. Refer to NFPA 432 Code for the Storage of Organic Peroxide Formulations
from the National Fire Protection Association for additional storage information.
OTHER PRECAUTIONS Unmixed, uncontaminated material, remaining at the end of the day, shall be returned
to a proper organic peroxide storage area. Under no circumstances should material be
returned to the original container.
SECTION 8 - EXPOSURE CONTROL/PERSONAL PROTECTION
VENTILATION Mechanical, general.
RESPIRATORY PROTECTION If airborne concentrations are expected to exceed acceptable levels wear a
NIOSH/MSHA approved air-purifying respirator with an organic vapor cartridge or
canister. When using respirators refer to OSHA's 29CFR 1910.134.
EYE PROTECTION Safety goggles recommended. Permanent eyewash is highly recommended.
HAND PROTECTION Protective gloves recommended, solvent resistant, such as butyl rubber, nitrile or
neoprene.
OTHER A safety shower and eyewash is recommended when the risk of a significant exposure
exits.
SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES
Water white liquid with a slight odor.
APPEARANCE AND ODOR:
Unknown 1.1
BOILING POINT: SPECIFIC GRAVITY:
Unknown >200篎 (93癈) C.O.C
VAPOR PRESSURE: FLASH POINT:
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MATERIAL SAFETY DATA SHEET
NOROX?MEKP-9
>1 FLAMMABLE LIMITS: Unknown
VAPOR DENSITY:
Unknown >60癈 (140癋)
EVAPORATION RATE: SADT:
Unknown Not applicable
% VOLATILE BY VOLUME: pH:
Slightly soluble in water.
SOLUBILITY IN WATER:
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MATERIAL SAFETY DATA SHEET
NOROX?MEKP-9
SECTION 10 - STABILITY AND REACTIVITY
STABILITY Stable when kept in original, closed container, out of direct sunlight at temperatures
below 80癋 (27癈).
CONDITIONS TO AVOID Contamination. Direct sunlight. Open flames. Prolonged storage above 100癋
(38癈). Storage above SADT. Storage near flammable or combustible materials.
MATERIALS TO AVOID Dimethylaniline, cobalt napthenate and other promoters, promoted resins, accelerators,
oxidizing and reducing agents, strong acids, bases, metals, metal alloys and salts,
sulfur compounds, amines or any hot material.
HAZARDOUS Decomposition products are flammable. Acrid smoke and irritating fumes.
DECOMPOSITION PRODUCTS
HAZARDOUS Will not occur.
POLYMERIZATION
SECTION 11 - TOXICOLOGICAL INFORMATION
Methyl Ethyl Ketone Peroxide
Hazard Data:
Inhalation: Rat--LC50: 200 ppm/4 hr, lung, thorax, respiration, or dyspnea; Mouse--LC50: 170 ppm/4 hr, lung, thorax,
respiration, or dyspnea.
Intraperitoneal: Rat--LD50: 65 mg/kg, behavioral, muscle weakness behavioral, ataxia.
Oral: Rat--LD50: 484 mg/kg; Mouse--LD50: 470 mg/kg; Human--TDLo: 480 mg/kg, changes in structure or function of
esophagus gastrointestinal, nausea or vomiting gastrointestinal.
Skin: Rabbit-- LD50: 500 mg.
Dimethyl Phthalate
Hazard Data:
Inhalation: Cat--LCLo: 9300 mg/m3/6.5 hr.
Intraperitoneal: Mouse--LD50: 1380 mg/kg.
Oral: Rat & Mouse--LD50: 6800 mg/kg, somnolence behavioral, withdrawal nutritional and gross metabolic, weight
loss or decreased weight gain; Dog--LD: >1400 mg/kg; Rabbit--LD50: 4400 uL/kg.
Subcutaneous: Mouse--LDLo: 6500 mg/kg, dyspnea lung, thorax, respiration, or cyanosis.
2,2,4-Trimethyl-1,3-pentanediol diisobutyrate
Hazard Data:
Oral: Rat--LD50: >3200 mg/kg
Hydrogen Peroxide
Hazard Data:
Inhalation: Mouse--LCLo: 227 ppm; Rat--TCLo: 67 ppm/6hr/6W-1, dermatitis, irritative of the skin.
Intraperitoneal: Mouse--LD50: 880 mg/kg.
Intravenous: Rabbit--LD50: 15 gm/kg, behavioral, convulsions or effect on seizure threshold.
Oral: Rat--LD50: 376 mg/kg, gastrointestinal, peritonitis blood, pigmented or nucleated red blood cells;
Mouse--LD50: 2 mg/kg.
Subcutaneous: Rat--LD50: 620 mg/kg; Mouse--LD50: 1072 mg/kg.
Skin: Rat--LD50: 4060 mg/kg, lung, thorax, respiration, or pulmonary emboli; Rabbit--LDLo: 500 mg/kg, behavioral,
convulsions or effect on seizure threshold.
Methyl Ethyl Ketone
Hazard Data:
Eye: Human: 350 ppm.
Inhalation: Rat--LC50: 23500 mg/m3/8hr.
Intraperitoneal: Rat--LD50: 607 mg/kg; Mouse--LD50: 616 mg/kg.
Oral: Rat--LD50: 2737 mg/kg; Mouse--LD50: 4050 mg/kg.
Skin: Rabbit--LD50: 6480 mg/kg.
SECTION 12 - ECOLOGICAL INFORMATION
No data is available on the preparation itself. The product should be prevented from entering drains, sewers, streams,
etc.
Ecotoxicity: Methyl ethyl ketone peroxide: EC50 (Guppy), 44.2 mg/L/96 hr; EC50 (alga), 42,700 ug/L/96 hr.
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MATERIAL SAFETY DATA SHEET
NOROX?MEKP-9
Environmental Fate: Methyl ethyl ketone peroxide (MEKP) was evaluated for biodegradability in a closed bottle
system and was reported to be readily biodegradable. An EC50 of 16mg MEKP/L activated sludge was reported in an
activated sludge respiration inhibition test.
SECTION 13 - DISPOSAL CONSIDERATIONS
Prevent material from entering drains, sewers, streams, etc.
Immediately dispose of waste material at a RCRA approved hazardous waste management facility in accordance with
federal, state and local regulations.
SECTION 14 - TRANSPORT INFORMATION
DOT Shipping Name: ORGANIC PEROXIDE TYPE D, LIQUID,
(METHYL ETHYL KETONE PEROXIDE, =45%)
DOT Hazard Class: 5.2
UN/NA ID No.: UN3105
DOT Packing Group: PG II
DOT RQ RQ
Labels: 5.2 (Organic Peroxide)
2000 ERG GUIDE NO.: 145
SECTION 15 - REGULATORY INFORMATION
The following chemicals are subject to the reporting requirements of Section 313 of Title III of the Superfund
Amendments and Reauthorization Act of 1986 and 40 CFR Part 372.
Chemical Name CAS Number Percent
Dimethyl Phthalate 131-11-3 43
Methyl Ethyl Ketone 78-93-3 02
Reportable Quantity
2-Butanone Peroxide (MEKP): 10 lbs (4.54 kg)
Australian Inventory of Chemical Substances (AICS)
The ingredients in this product are listed in the Australian AICS Inventory.
Canadian Domestic Substances List (DSL)
The ingredients in this product are listed in the Canadian DSL Inventory.
European Inventory of Existing Commercial Chemical Substances (EINECS)
The ingredients in this product are listed in the European EINECS Inventory.
TSCA Status
The ingredients in this product are listed in the US Toxic Substances Control Act (TSCA) Inventory.
Status of Carcinogicity
Not recognized as a carcinogen by the IARC, NTP or OSHA.
SECTION 16 - OTHER INFORMATION
VOC Information
Using ASTM Test Method D-2369-87, but at 40癈 (since MEKP decomposes rapidly above 100癈 and is not a
VOC), MEKP-9 contains 2.4% VOC, by weight, or 27 grams per liter. For more information call Norac.
NFPA 432 Organic Peroxide Classification
Class III
NFPA 704 Rating HMIS Rating
Health Flammability Reactivity Health Flammability Reactivity
3 2 2 3 2 2
MSDS Reference: MEKP-9 MSDS 0404.8
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MATERIAL SAFETY DATA SHEET
NOROX?MEKP-9
DISCLAIMER OF LIABILITY
The information in this MSDS was obtained from sources, which we believe are reliable. However, the information is provided without any warranty, express or implied, regarding its correctness.
The conditions or methods of handling, storage, use and disposal of the product are beyond our control and may be beyond our knowledge. For this and other reasons, we do not assume responsibility and
expressly disclaim liability for loss, damage or expense arising out of or in any way connected with the handling, storage, use, or disposal of the product.
This MSDS was prepared and is to be used only for this product. If the product is used as a component in another product, this MSDS information may not be applicable.
Norac, Inc. Page 6 of 6
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