4- tert- butyltoluene

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Structural formula
Structural formula of 4-tert-butyltoluene
General
Surname 4- tert- butyltoluene
other names
  • 1- tert- butyl-4-methylbenzene
  • para - tert -butyltoluene
  • PTBT
Molecular formula C 11 H 16
Brief description

colorless liquid

External identifiers / databases
CAS number 98-51-1
EC number 202-675-9
ECHA InfoCard 100.002.433
PubChem 7390
Wikidata Q20972145
properties
Molar mass 148.25 g mol −1
Physical state

liquid

density

0.82 g cm −3 (20 ° C)

Melting point

−52 ° C

boiling point

193 ° C

Vapor pressure

0.867 hPa (25 ° C)

solubility

heavy in water (6 g l −1 at 20 ° C)

Refractive index

1.492 (20 ° C)

safety instructions
GHS labeling of hazardous substances
06 - Toxic or very toxic 08 - Dangerous to health 09 - Dangerous for the environment

danger

H and P phrases H: 302-330-319-361f-370-411
P: 304 + 340 + 310-305 + 351 + 338
Toxicological data
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

4- tert- butyltoluene is a chemical compound from the group of alkylbenzenes .

Extraction and presentation

4- tert -Butyltoluol can be prepared by alkylation of toluene with isobutylene can be obtained.

properties

4- tert -Butyltoluene is a flammable colorless liquid that is sparingly soluble in water.

use

4- tert- butyltoluene is used as a solvent for synthetic resins and as an intermediate in the manufacture of other chemical compounds.

4- tert -Butylbenzaldehyde can be obtained by oxidizing 4- tert -butyltoluene with hydrogen peroxide in glacial acetic acid , catalyzed by bromide ions in combination with cobalt (II) acetate or cerium (III) acetate .

The standard process for the production of 4- tert- butylbenzoic acid is the oxidation of 4- tert- butyltoluene in the liquid phase with atmospheric oxygen under catalysis with cobalt salts , preferably cobalt (II) acetate .

Air oxidation from PTBT to PTBBA

safety instructions

The vapors of 4- tert- butyltoluene can form an explosive mixture with air ( flash point > 55 ° C, ignition temperature 510 ° C).

Individual evidence

  1. ↑ a b c d e f g h i j k l m Entry on 4-tert-butyltoluene in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .
  2. ↑ Data sheet 4-tert-butyltoluene, 95% from Sigma-Aldrich , accessed on August 21, 2017 ( PDF ).
  3. ↑ a b Entry on 4-tert-butyltoluene in the Hazardous Substances Data Bank , accessed on August 21, 2017.
  4. ^ Leon GA van de Water, Arati Kaza, James K. Beattie, Anthony F. Masters, Thomas Maschmeyer: Partial Oxidation of 4- tert -Butyltoluene Catalyzed by Homogeneous Cobalt and Cerium Acetate Catalysts in the Br - / H 2 O 2 / Acetic Acid System: Insights into Selectivity and Mechanism . In: Chemistry - A European Journal . tape 13 , no. 28 , 2007, pp. 8037-8044 , doi : 10.1002 / chem.200700371 .
  5. ↑ GW Hearne, TW Evans, VW Buls, CG Schwarzer: Preparation of tert-Alkylbenzoic Acids by Liquid Phase Catalytic Oxidation . In: Ind. Eng. Chem. Band 47 , no. 11 , 1955, pp. 2311-2313 , doi : 10.1021 / ie50551a035 .
  6. ↑ Patent US4603220 : Process for the preparation of aromatic monocarboxylic acids from toluene and substituted toluenes. Applied on July 18, 1984 , published July 29, 1986 , applicant: Dynamit Nobel AG, inventor: M. Feld. ‌