vulcanizing agent rubber use tert-Butyl hydroperoxide

Slightly soluble in water, easily soluble in ethanol, ether and other organic solvents

Tert-Butyl hydroperoxide

Other Names: TBHP, t-ButyL Hydroperoxide

,Tbhp-70;T-Hydro;cadoxtbh;Trigonox;tertiary-;Cadox,TBH;perbutylh;T-HYDRO(R)

CAS Number:  75-91-2

Molecular Formula: C4H10O2

Description

tert-Butyl hydroperoxide (TBHP) is an organic peroxide widely used in a variety of oxidation processes.

tert-Butyl hydroperoxide Properties

Melting point-2.8 °C

Boiling point37 °C (15 mmHg)

Density0.937 g/mL at 20 °C

vapor pressure62 mmHg at 45 °C

refractive indexn20/D 1.403

Flash point85 °F

storage temp.2-8°C

pkapK1: 12.80 (25°C)

formLiquid colorClear colorless Water SolubilityMiscible

Exposure limitsNo exposure limit is set. On the basis of its irritant properties a ceiling limit of 1.2 mg/m3 (0.3 ppm) is recommended.

StabilityStable, but may explode if heated under confinement. Decomposition may be accelerated by traces of metals, molecular sieve or other contaminants. Incompatible with reducing agents, combustible material, acids.

InChIKeyCIHOLLKRGTVIJN-UHFFFAOYSA-N

Indirect Additives used in Food Contact SubstancesTERT-BUTYL HYDROPEROXIDE

FDA 21 CFR175.105; 176.170

CAS DataBase Reference75-91-2(CAS DataBase Reference)

FDA UNII955VYL842B

NIST Chemistry ReferenceTert-butyl hydroperoxide(75-91-2)

EPA Substance Registry Systemtert-Butyl hydroperoxide (75-91-2)

Chemical Properties

tert-Butyl hydroperoxide (TBHP) is a water-white liquid commonly commercially available as a 70% solution in water; 80% solutions are also available. It is used to initiate polymerization reactions and in organic syntheses to introduce peroxy groups into the molecule. TBHP vapor can burn in the absence of air and may be flammable at either elevated temperature or at reduced pressure. Fine mist/spray may be combustible at temperatures below the normal flash point. When evaporated, the residual liquid will concentrate TBHP content and may reach an explosive concentration (＞90%). Closed containers may generate internal pressure through the degradation of TBHP to oxygen . TBHP is a highly reactive product. The three types of significant physical hazards are flammability, thermal, and decomposition due to contamination. To minimize these hazards, avoid exposure to heat, fire, or any condition that will concentrate the liquid material. Store away from heat, sparks, open flames, foreign contaminants, combustibles, and reducing agents. Inspect containers frequently to identify bulges or leaks (7a, 125).

Uses

TBHP is an intermediate in the production of propylene oxide and t-butyl alcohol from isobutane and propylene. It is primarily used as an initiator and finishing catalyst in the solution and emulsion polymerization methods for polystyrene and polyacrylates. Other uses are for the polymerization of vinyl chloride and vinyl acetate and as an oxidation and sulfonation catalyst in bleaching and deodorizing operations. It is a strong oxidant and reacts violently with combustible and reducing materials, and metallic and sulfur compounds.

Production Methods

TBHP is produced by the liquid-phase reaction of isobutane and molecular oxygen or by mixing equimolar amounts of t-butyl alcohol and 30–50% hydrogen peroxide. TBHP can also be prepared from t-butyl alcohol and 30% hydrogen peroxide in the presence of sulfuric acid or by oxidation of tert-butylmagnesium chloride. The manufacturing process of TBHP is in a closed system.

Definition

ChEBI: Tert-butyl hydroperoxide is an alkyl hydroperoxide in which the alkyl group is tert-butyl. It is widely used in a variety of oxidation processes. It has a role as an antibacterial agent and an oxidising agent.