tert-Butyl hydroperoxide

  • Ethyldiethylperoxide
  • 1,1-Dimethylethylhydroperoxide
  • 2-Hydroperoxy-2-methylpropane
  • Perbutyl H 69T
  • Luperox TBH 70X
  • tert-Butyl hydroperoxide, not more than 80% in Di-tert-butyl peroxide and/or solvent
Formula
C4H10O2
Structure
Description
Water-white liquid.
Uses
Catalyst in polymerization reactions.

Registry Numbers and Inventories.
CAS
75-91-2
EC (EINECS/ELINCS)
200-915-7
R 7 20/21/22 34 44 51/53
S 3/7 26 36/37/39 45 61
RTECS
EQ4900000
RTECS class
Mutagen; Primary Irritant
UN (DOT)
2092, 2093, 2094
Merck
13,1569
Beilstein/Gmelin
1098280
Beilstein Reference
4-01-00-01616
EPA OPP
105301
Swiss Giftliste 1
G-2171
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H10O2
Formula mass
90.12
Melting point, °C
5.5
Boiling point, °C
156
Vapor pressure, mmHg
5 (25 C)
Vapor density (air=1)
2.07
Odor Threshold Odor threshold Odorless
Density
0.791 g/cm3 (20 C)
Solubility in water
Slightly soluble
Refractive index
1.402 (20 C)
pKa/pKb
12.8 (pKa)
Heat of vaporization
49.60 kJ/mol
Heat of combustion
-2738 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Keep combustibles (wood, paper, oil, etc.) away from spilled material. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Keep substance wet using water spray. Stop leak if you can do it without risk. SMALL SPILLS: Take up with inert, damp, noncombustible material using clean non-sparking tools and place into loosely covered plastic containers for later disposal.
Stability
Stable to 75 C; slow 1st-order decomp can be accelerated by presence of 1 mole-% of copper, cobalt and manganese salts.
Incompatibilities
The substance is a strong oxidant and reacts violently with combustible and reducing materials, metallic and sulfur compounds.

Fire.
Flash Point,°C
27
Autoignition, °C
204
Upper exp. limit, %
10
Lower exp. limit, %
5
Fire fighting
SMALL FIRES: Water spray or fog is preferred; if water not available use dry chemical, carbon dioxide or regular foam. LARGE FIRES: Flood fire area with water from a distance. Use water spray or fog; do not use straight streams. Move containers from fire area if you can do it without risk. Do not move cargo or vehicle if cargo has been exposed to heat. Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.
Fire potential
A reactive, oxidizing, flammable liquid. Dangerous when exposed to heat or flame. It is heat sensitive. Spontaneous chem reaction and ignition. May occur if mixed with readily oxidizable, organic or flammable materials.
Hazards
May explode from heat or contamination. May ignite combustibles (wood, paper, oil, clothing, etc.). May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect. Containers may explode when heated. Runoff may create fire or explosion hazard.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
4
 
Flammability
4
 
 
Reactivity
4
 

Health.
Exposure limit(s)
OEL-RUSSIA:STEL 5 mg/m3;Skin
Poison_Class
2
Exposure effects
Abnormally low blood pressure and apnea have been reported with severe poisonings. Cerebral edema, cerebral gas embolism, cerebral infarction, and seizures have been reported following ingestion of concentrated (35%) solutions. Death has been reported as a result of embolic cerebrovascular injury.
   Ingestion
Burns of the esophagus and less commonly the stomach may occur after caustic ingestion; the absence of oral mucosal injury does not reliably exclude esophageal burns. Patients with stridor, drooling or vomiting are more likely to have esophageal burns.
   Inhalation
Stridor, dyspnea, upper airway injury, and pulmonary edema, especially following inhalation of vaporized caustics, may occur.
   Skin
Severe skin irritation and/or burns may occur.
   Eyes
See Inhalation.

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. Corrosive chemicals will destroy the membranes of the mouth, throat, and esophagus and volatile chemicals have a high risk of being aspirated into the victim's lungs during vomiting. Thus, the risk of increasing the medical problems by inducing vomiting of a volatile corrosive chemical is very high. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
2092, 2093, 2094
Response guide
Hazard class
5.2
USCG CHRIS Code
BHP