Methyl Heptenone(PG)

Product Name:

Methyl heptenone（PG）

Synonyms:

2-Methyl-6-oxo-2-heptene;2-methylhept-2-en-6-one;2-Oxo-6-methylhept-5-ene;5-Hepten-2-one,6-methyl-;6-methyI-5-hepten-2-one;6-methyl-5-hepten-2-on;6-Methyl-5-hepten-2-one,(2-2-6);6-Methyl-5-hepten-2-one, 97.50%

CAS:

110-93-0

MF:

C8H14O

MW:

126.2

EINECS:

203-816-7

Product Categories:

Alphabetical Listings;Certified Natural ProductsFlavors and Fragrances;Flavors and Fragrances;M-N;C7 to C8;Carbonyl Compounds;Ketones

Mol File:

110-93-0.mol

Melting point 

-67.1 °C

Boiling point 

73 °C18 mm Hg(lit.)

density 

0.855 g/mL at 25 °C(lit.)

FEMA 

2707 | 6-METHYL-5-HEPTEN-2-ONE

refractive index 

n20/D 1.439(lit.)

Fp 

123 °F

storage temp. 

Flammables area

solubility 

Soluble in methanol and chloroform.

form 

neat

Specific Gravity

0.855

PH

6.6 (3g/l, H2O, 25℃)

explosive limit

1.1-7.3%(V)

Water Solubility 

insoluble

JECFA Number

1120

BRN 

1741705

CAS DataBase Reference

110-93-0(CAS DataBase Reference)

NIST Chemistry Reference

5-Hepten-2-one, 6-methyl-(110-93-0)

EPA Substance Registry System

6-Methyl-5-hepten-2-one (110-93-0)

Risk Statements 

10-36/37/38

Safety Statements 

16-24/25

RIDADR 

UN 1224 3/PG 3

WGK Germany 

1

RTECS 

MJ9700000

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29141990

Description

Methyl heptenone（PG）has a strong, fatty, green, citrus-like odor, and a bittersweet taste reminiscent of pear. May be prepared from oil of lemongrass or from citral by refluxing for 12 hours in aqueous solution containing K2C 03, and subsequent distillation and vacuum fractionation; from acetoacetic ester and methylbuten-3-ol-2 with aluminum alcoholate in Carroll’s reaction followed by pyrolysis of the ester.

Chemical Properties

Methyl heptenone（PG）e has a strong, fatty, green, citrus-like odor and bittersweet taste reminiscent of pear.

Chemical Properties

CLEAR SLIGHTLY YELLOW LIQUID

Chemical Properties

Methyl heptenone（PG）is an important intermediate in the synthesis of terpenoids. Its odor properties are not impressive. It occurs in nature as a degradation product of terpenes. (Z)- and (E)-Tagetone, [3588-18-9], [6752-80-3], are major components of tagetes oil. Solanone [1937-54-8] and pseudoionone [141-10-6] are acyclicC13 ketoneswith a terpenoid skeleton. Solanone is one of the flavor-determining constituents of tobacco, and pseudoionone is an intermediate in the synthesis of ionones.

Uses

Organic synthesis, inexpensive perfumes, fla-voring.

Definition

ChEBI: A heptenone that is hept-5-en-2-one substituted by a methyl group at position 6. It is a volatile oil component of citronella oil, lemon-grass oil and palmarosa oil.

Preparation

From oil of lemongrass or from citral by refluxing for 12 hours in aqueous solution containing K2CO3, and subsequent distillation and vacuum fractionation; from acetoacetic ester and methyl-buten-3-ol-2 with aluminum alcoholate in Carroll’s reaction followed by pyrolysis of the ester

Aroma threshold values

Detection: 50 ppb

Taste threshold values

Taste characteristics at 10 ppm: green, vegetative, musty, apple, banana and green bean-like.

Safety Profile

Moderately toxic by ingestion. A skin irritant. Flammable liquid when exposed to heat, sparks, or flame. When heated to decomposition it emits acrid smoke and irritating fumes.

Preparation Products

Citral-->Linalool-->GERANIC ACID-->6-AMINO-2-METHYL-2-HEPTANOL

Raw materials

Isoprene