2,5-DIMETHYLPYRAZINE

PRODUCT IDENTIFICATION
CAS NO. 123-32-0

2,5-DIMETHYLPYRAZINE

EINECS NO. 204-618-3
FORMULA C6H8N2
MOL WT. 108.14

H.S. CODE

 2933.99.7900

TOXICITY

 Rat LD50 (Oral):1020mg/kg
SYNONYMS 2,5-Dimethyl-1,4-diazine; 2,5-Dimethyl paradiazine;
2,5-Dimetilpirazina; 2,5-Diméthylpyrazine; FEMA No. 3272

SMILES

 c1(cnc(C)cn1)C

CLASSIFICATION

 Flavors and Fragrances agent,

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE clear to pale yellow liquid

MELTING POINT

 15 C
BOILING POINT 155 C
SPECIFIC GRAVITY 0.99

SOLUBILITY IN WATER

 Soluble (3.20E+04 mg/l at 25 C)
SOLUBILITY IN SOLVENTS Soluble in organic solvents. Miscible with ethanol, ethylether, acetone
pKa 1.85 (Dissociation Constant at 20 C)
log Pow 0.63 (Octanol-water)
VAPOR PRESSURE 1.5 (mmHg at 25 C)
HENRY'S LAW 3.55E-06 (atm-m3/mole at 25 C)
OH RATE 1.01E-12 (cm3/molecule-sec at 25 C Atmospheric )
VAPOR DENSITY

 

AUTOIGNITION  

REFRACTIVE INDEX

 1.4987 - 1.5007
NFPA RATINGS  
FLASH POINT 63 C
STABILITY Stable under ordinary conditions. Hygroscopic.

GENERAL DESCRIPTION & EXTERNAL LINKS
Pyrazine, hygroscopic white solid, is an aromatic nitrogen compound characterized by a ring structure contains  4 carbon atoms with two nitrogen atoms at 1 and 4 positions; melting at 55 - 56 C, boiling at 115 - 116 C. Pyrazine is freely soluble in water. It is fused to form many polycyclic compounds, as useful structures in pharmaceuticals and perfumes. It is a component of the folates (vitamin B compounds) and of the isoalloxazine ring nucleus of flavins. Numerous pyrazine derivatives such as pyrazine polycyclic compounds, alkyl-, alicyclic-, and alkylaryl-substituted compounds, derivatives containing oxygenated functional groups and thio- functional groups in the side-chains are used in biological, drug, flavouring and perfumery industry. 2,5-Dimethyl Pyrazine is used as a composition of flavouring especially in baked property. Odor Description : Cocoa, roasted nuts, roast beef, woody, grassy.

Wikipedia Linking:http://en.wikipedia.org/wiki/Alkylpyrazine

http://www.inchem.org/
WHO FOOD ADDITIVES SERIES: 48. SAFETY EVALUATION OF CERTAIN FOOD ADDITIVES AND CONTAMINANTS PYRAZINE DERIVATIVES

http://www.reciprocalnet.org/
Traditionally used by the Chinese, 2,5-dimethylpyrazine is often used in food preparations. It has a fried peanut, chocolate, butter, or potato-like flavor. This compound is mainly used to confect the essence of cocoa, coffee, meat, or potato flavor and is also an ingredient in cigarettes

http://www.chemicalland21.com/
Flavouring Substances Chemical Group 24: Pyrazine derivatives.
SALES SPECIFICATION

APPEARANCE

 clear to pale yellow liquid
ASSAY (G.C) 97.0% min

WATER

 3.0% max
TRANSPORTATION
PACKING  
HAZARD CLASS 3 (Packing Group: III)
UN NO. 1993
OTHER INFORMATION
Hazard Symbols: XN, Risk Phrases: 22-36/37/38, Safety Phrases: 26-37/39
FEMA NO. 3272