Pentamethylbenzene
- Product Name
- Pentamethylbenzene
- CAS No.
- 700-12-9
- Chemical Name
- Pentamethylbenzene
- Synonyms
- 1,2,3,4,5-PENTAMETHYLBENZENE;PentaMethy;PENTAMETHYLBENZENE;Pentamethyl phenyl;Pentmethyl Benzene;pentamethyl-benzen;benzene,pentamethyl-;Pentamethylbenzene>Pentamethylbenzene,99%;Pentamethylbenzene~95%
- CBNumber
- CB6854133
- Molecular Formula
- C11H16
- Formula Weight
- 148.24
- MOL File
- 700-12-9.mol
Pentamethylbenzene Property
- Melting point:
- 49-51 °C (lit.)
- Boiling point:
- 231 °C (lit.)
- Density
- 0.917 g/mL at 25 °C (lit.)
- refractive index
- 1.5270
- Flash point:
- 196 °F
- storage temp.
- Sealed in dry,Room Temperature
- form
- powder to crystal
- color
- White to Almost white
- Water Solubility
- 15.52mg/L(temperature not stated)
- BRN
- 1905349
- CAS DataBase Reference
- 700-12-9(CAS DataBase Reference)
- NIST Chemistry Reference
- Benzene, pentamethyl-(700-12-9)
- EPA Substance Registry System
- Benzene, pentamethyl- (700-12-9)
Safety
- Hazard Codes
- F,Xi
- Risk Statements
- 11-36/37/38
- Safety Statements
- 16-26-36
- RIDADR
- UN 1325 4.1/PG 2
- WGK Germany
- 3
- TSCA
- Yes
- HazardClass
- 4.1
- PackingGroup
- III
- HS Code
- 29029090
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H228Flammable solid
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- 153613
- Product name
- Pentamethylbenzene
- Purity
- 98%
- Packaging
- 5g
- Price
- $76.5
- Updated
- 2024/03/01
- Product number
- 153613
- Product name
- Pentamethylbenzene
- Purity
- 98%
- Packaging
- 100g
- Price
- $298
- Updated
- 2024/03/01
- Product number
- P0043
- Product name
- Pentamethylbenzene
- Purity
- >99.0%(GC)
- Packaging
- 5g
- Price
- $62
- Updated
- 2024/03/01
- Product number
- P0043
- Product name
- Pentamethylbenzene
- Purity
- >99.0%(GC)
- Packaging
- 25g
- Price
- $175
- Updated
- 2024/03/01
- Product number
- L04163
- Product name
- Pentamethylbenzene, 99%
- Packaging
- 5g
- Price
- $33.65
- Updated
- 2024/03/01
Pentamethylbenzene Chemical Properties,Usage,Production
Chemical Properties
Pentamethylbenzene is a white to light yellow crystalline powder with a sweet odor. The compound is classified as an aromatic hydrocarbon. It is a relatively easily oxidized benzene derivative, with E1/2 of 1.95 V vs NHE.
Uses
Pentamethylbenzene was used to prepare a mixture of nitropentamethylbenzene and 2,3,4,5-tetramethylbenzyl nitrate. It was also used to prepare propene.
Definition
ChEBI: Pentamethylbenzene is a methylbenzene that is benzene in which five of the hydrogens are replaced by methyl groups.
Synthesis Reference(s)
Synthesis, p. 979, 1985 DOI: 10.1055/s-1985-31413
Synthesis
Pentamethylbenzene is obtained as a minor product in the Friedel–Crafts methylation of xylene to durene (1,2,4,5-tetramethylbenzene). Like durene, pentamethylbenzene is rather electron-rich and undergoes electrophilic substitution readily. Indeed, it is used as a scavenger for carbocations.
Pentamethylbenzene has been observed as an intermediate in the formation of hexamethylbenzene from phenol and alkylation of durene or pentamethylbenzene has been reported as a suitable starting material for the synthesis of hexamethylbenzene.
Purification Methods
Successively crystallise it from absolute EtOH, aqueous EtOH, MeOH, toluene *C6H6, and dry it under vacuum. [Rader & Smith J Am Chem Soc 84 1443 1962.] It has also been sublimed. The 1,3,5-trinitrobenzene complex (1:1) has m 121o (EtOH). [Beilstein 5 H 443, 5 III 1010, 5 IV 1109.]
Precautions
Incompatible with oxidizing agents. Store in cool place. Keep container tightly closed in a dry and well-ventilated place.
Pentamethylbenzene Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from Pentamethylbenzene manufacturers
- Product
- Pentamethylbenzene 700-12-9
- Price
- US $100.00-1.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- g-kg-tons, free sample is available
- Release date
- 2023-12-25
- Product
- Pentamethylbenzene 700-12-9
- Price
- US $0.00-0.00/kg
- Min. Order
- 1kg
- Purity
- 98%
- Supply Ability
- 1Ton
- Release date
- 2022-09-29
- Product
- Pentamethylbenzene 700-12-9
- Price
- US $15.00-10.00/KG
- Min. Order
- 1KG
- Purity
- 99%+ HPLC
- Supply Ability
- Monthly supply of 1 ton
- Release date
- 2021-07-11