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**** MATERIAL SAFETY DATA SHEET ****

tert-Butyl hydroperoxide, 70% solution in water.

**** SECTION 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION ****

MSDS Name: tert-Butyl hydroperoxide, 70% solution in water.

Catalog Numbers:

18034-0000, 18034-0050, 18034-2500, 18034-5000

Synonyms:

TBHP

Company Identification (Europe): Acros Organics BVBA

Janssen Pharmaceuticalaan 3a

2440 Geel, Belgium

Company Identification (USA): Acros Organics

One Reagent Lane

Fairlawn, NJ 07410

For information in North America, call: 800-ACROS-01

For information in Europe, call: 0032(0) 14575211

For emergencies in the US, call CHEMTREC: 800-424-9300

For emergencies in Europe, call: 0032(0) 14575299

**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+-----------+---------------+

| CAS# | Chemical Name |% | EINECS# |Haz Symbols| Risk Phrases |

|----------------|--------------------------------------|----------|-----------|-----------|---------------+

|----------------|--------------------------------------|----------|-----------|-----------|---------------|

| 75-91-2 |tert-Butyl hydroperoxide | 70%| 200-915-7 | E C| 2 20/21/22 34 7|

|----------------|--------------------------------------|----------|-----------|-----------|---------------|

| 7732-18-5 |Water | | 231-791-2 |||

+----------------+--------------------------------------+----------+-----------+-----------+---------------+

Text for R-phrases: see Section 16

Hazard Symbols: O C

Risk Phrases: 10 20/21/22 34 43 7

**** SECTION 3 - HAZARDS IDENTIFICATION ****

EMERGENCY OVERVIEW

Flammable. Harmful by inhalation, in contact with skin and if

swallowed. Causes burns. May cause sensitization by skin contact.

May cause fire. Harmful to aquatic organisms, may cause long-term

adverse effects in the aquatic environment.

Potential Health Effects

Eye:

Causes eye burns. May cause eye injury.

Skin:

Harmful if absorbed through the skin. Causes skin burns. May cause

sensitization by skin contact.

Ingestion:

Harmful if swallowed. Causes gastrointestinal tract burns.

Inhalation:

Causes chemical burns to the respiratory tract. Inhalation may be

fatal as a result of spasm, inflammation, edema of the larynx and

bronchi, chemical pneumonitis and pulmonary edema. May cause burning

sensation, coughing, wheezing, laryngitis, shortness of breath,

headache, nausea, and vomiting.

Chronic:

Not available.

**** SECTION 4 - FIRST AID MEASURES ****

Eyes:

Immediately flush eyes with plenty of water for at least 15 minutes,

occasionally lifting the upper and lower eyelids. Get medical aid

immediately.

Skin:

Get medical aid immediately. Immediately flush skin with plenty of

water for at least 15 minutes while removing contaminated clothing

and shoes.

Ingestion:

Do not induce vomiting. If victim is conscious and alert, give 2-4

cupfuls of milk or water. Get medical aid immediately.

Inhalation:

Get medical aid immediately. Remove from exposure and move to fresh

air immediately. If not breathing, give artificial respiration. If

breathing is difficult, give oxygen.

Notes to Physician:

Treat symptomatically and supportively.

**** SECTION 5 - FIRE FIGHTING MEASURES ****

General Information:

As in any fire, wear a self-contained breathing apparatus in

pressure-demand, MSHA/NIOSH (approved or equivalent), and full

protective gear. Strong oxidizer. Contact with combustible materials

may cause a fire. Will burn if involved in a fire.

Extinguishing Media:

Use water spray to cool fire-exposed containers. Use dry chemical,

carbon dioxide, or alcohol-resistant foam. Do NOT use halogenated

agents.

**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****

General Information: Use proper personal protective equipment as indicated

in Section 8.

Spills/Leaks:

Absorb spill with inert material (e.g. vermiculite, sand or earth),

then place in suitable container. Avoid runoff into storm sewers and

ditches which lead to waterways. Remove all sources of ignition. Use

a spark-proof tool. Isolate area and deny entry. Provide

ventilation.

**** SECTION 7 - HANDLING and STORAGE ****

Handling:

Use spark-proof tools and explosion proof equipment. Do not breathe

dust, vapor, mist, or gas. Do not get in eyes, on skin, or on

clothing. Take precautionary measures against static discharges. Use

only in a chemical fume hood.

Storage:

Do not store near combustible materials. Store in a tightly closed

container. Store in a dry area. Refrigerator/flammables. Keep at

temperature not exceeding 45°C.

**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****

Engineering Controls:

Facilities storing or utilizing this material should be equipped

with an eyewash facility and a safety shower. Use adequate

ventilation to keep airborne concentrations low.

Personal Protective Equipment

Eyes:

Wear chemical goggles.

Skin:

Wear appropriate protective gloves to prevent skin

exposure.

Clothing:

Wear appropriate protective clothing to prevent skin

exposure.

Respirators:

Follow the OSHA respirator regulations found in 29

CFR 1910.134 or European Standard EN 149. Always use

a NIOSH or European Standard EN 149 approved

respirator when necessary.

**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****

Physical State: Clear liquid

Color: APHA: 20 max

Odor: weak odor

pH: Not available.

Vapor Pressure: 62 mm Hg @ 45 deg C

Viscosity: 4.1 mPas 20 deg C

Boiling Point: 37 deg C @ 15 mmHg

Freezing/Melting Point: -2.8 deg C

Autoignition Temperature: 204 deg C ( 399.20 deg F)

Flash Point:43 deg C ( 109.40 deg F)

Explosion Limits, lower:Not available.

Explosion Limits, upper:Not available.

Decomposition Temperature: 75 deg C

Solubility in water:Miscible.

Specific Gravity/Density: .9400g/cm3

Molecular Formula: C4H10O2

Molecular Weight: 90.12

**** SECTION 10 - STABILITY AND REACTIVITY ****

Chemical Stability:

A dangerous self-accelerating decomposition reaction and, under

certain circumstances, explosion or fire can be caused by direct

contact with incompatible substances or by thermal decomposition at

and above the SADT (see Section 16).

Conditions to Avoid:

Incompatible materials, light, ignition sources, combustible

materials, organic materials, temperatures above 75°C (167°F),

freezing temperatures.

Incompatibilities with Other Materials:

Reducing agents, acids, bases, finely powdered metals, heavy metals.

Hazardous Decomposition Products:

Carbon monoxide, carbon dioxide.

Hazardous Polymerization: Will not occur.

**** SECTION 11 - TOXICOLOGICAL INFORMATION ****

RTECS#:

CAS# 75-91-2: EQ4900000

CAS# 7732-18-5: ZC0110000

LD50/LC50:

CAS# 75-91-2: Draize test, rabbit, eye: 7 mgDraize test, rabbit,

eye: 100 mg/24H ModerateDraize test, rabbit, eye: 70 uL Severe

Draize test, rabbit, eye: 75%Draize test, rabbit, eye: 0.02 mL

Draize test, rabbit, skin: 500 mgDraize test, rabbit, skin: 500

mg/24H SevereInhalation, mouse: LC50 = 350 ppm/4HInhalation,

mouse: LC50 = 1800 mg/m3/4HInhalation, rat: LC50 = 500 ppm/4H

Inhalation, rat: LC50 = 1800 mg/m3/4HOral, mouse: LD50 = 320 mg/kg

Oral, mouse: LD50 = 320 mg/kgOral, rat: LD50 = 370 mg/kgOral,

rat: LD50 = 370 mg/kgSkin, rabbit: LD50 = 460 uL/kgSkin, rat:

LD50 = 790 mg/kg.

CAS# 7732-18-5: Oral, rat: LD50 = >90 mL/kg.

Irritation:

Eye, rabbit: 7 mg

Eye, rabbit: 150 mg/1M severe

Carcinogenicity:

tert-Butyl hydroperoxide -

Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.

Water -

Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.

See actual entry in RTECS for complete information.

**** SECTION 12 - ECOLOGICAL INFORMATION ****

Ecotoxicity:

Fish: Zebrafish: LC50: 57 mg/l96Hacute

Other

Not readily biodegradable. Avoid entering into waters or underground

water.

**** SECTION 13 - DISPOSAL CONSIDERATIONS ****

Dispose of in a manner consistent with federal, state, and local regulations.

**** SECTION 14 - TRANSPORT INFORMATION ****

IATA

Shipping Name: ORGANIC PEROXIDE TYPE F, LIQUID*

Hazard Class: 5.2

UN Number: 3109

Packing Group:

IMO

Shipping Name: ORGANIC PEROXIDE TYPE F, LIQUID (tert-Butyl hydrop

eroxide)

Hazard Class: 5.2

UN Number: 3109

Packing Group:

RID/ADR

Shipping Name: ORGANIC PEROXIDE TYPE F, LIQUID (tert-Butyl hydrop

eroxide)

Hazard Class: 5.2

UN Number: 3109

Packing group:

**** SECTION 15 - REGULATORY INFORMATION ****

European/International Regulations

European Labeling in Accordance with EC Directives

Hazard Symbols: O C

Risk Phrases:

R 10 Flammable.

R 20/21/22 Harmful by inhalation, in contact with

skin and if swallowed.

R 34 Causes burns.

R 43 May cause sensitization by skin contact.

R 52/53 Harmful to aquatic organisms, may cause

long-term adverse effects in the aquatic environment.

R 7 May cause fire.

Safety Phrases:

S 3/7 Keep container tightly closed in a cool,

well-ventilated place.

S 14A Keep away from acids, reducing agents and

polymerisation catalysts.

S 16 Keep away from sources of ignition - No

smoking.

S 17 Keep away from combustible material.

S 24 Avoid contact with skin.

S 36/37/39 Wear suitable protective clothing, gloves

and eye/face protection.

S 45 In case of accident or if you feel unwell, seek

medical advice immediately (show the label where

possible).

S 61 Avoid release to the environment. Refer to

special instructions/safety data sheets.

WGK (Water Danger/Protection)

CAS# 75-91-2: No information available.

CAS# 7732-18-5: No information available.

United Kingdom Occupational Exposure Limits

United Kingdom Maximum Exposure Limits

Canada

CAS# 75-91-2 is listed on Canada's DSL List.

CAS# 7732-18-5 is listed on Canada's DSL List.

CAS# 75-91-2 is listed on Canada's Ingredient Disclosure List.

CAS# 7732-18-5 is not listed on Canada's Ingredient Disclosure List.

Exposure Limits

CAS# 75-91-2: OEL-GERMANY

OEL-RUSSIA:STEL 5 mg/m3Skin

US FEDERAL

TSCA

CAS# 75-91-2 is listed on the TSCA inventory.

CAS# 7732-18-5 is listed on the TSCA inventory.

**** SECTION 16 - ADDITIONAL INFORMATION ****

SADT (Self-Accelerating Decomposition Temperature): 80°C

MSDS Creation Date: 10/28/1996 Revision #2 Date: 8/02/2002

The information above is believed to be accurate and represents the best

information currently available to us. However, we make no warranty of

merchantability or any other warranty, express or implied, with respect to

such information, and we assume no liability resulting from its use. Users

should make their own investigations to determine the suitability of the

information for their particular purposes. In no way shall the company be

liable for any claims, losses, or damages of any third party or for lost

profits or any special, indirect, incidental, consequential or exemplary

damages, howsoever arising, even if the company has been advised of

the possibility of such damages.

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