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ChemicalBook >> CAS DataBase List >>2,5-Dimethyl pyrazine

2,5-Dimethyl pyrazine

CAS No.
123-32-0
Chemical Name:
2,5-Dimethyl pyrazine
Synonyms
2,5-DIMETHYLPYRAZINE;2,5-Dimethylprazin;Pyrazine,2,5-dimethyl-;2,5-Dimethyl;Structural formula;2,5-Dimethylpiazine;2,5-dimethyl-pyrazin;KETINE;tomfor;GLYCOLINE
CBNumber:
CB0159355
Molecular Formula:
C6H8N2
Molecular Weight:
108.14
MDL Number:
MFCD00006147
MOL File:
123-32-0.mol
MSDS File:
SDS
Last updated:2024-12-18 13:37:16

2,5-Dimethyl pyrazine Properties

Melting point 15°C
Boiling point 155 °C (lit.)
Density 0.99 g/mL at 25 °C (lit.)
FEMA 3272 | 2,5-DIMETHYLPYRAZINE
refractive index n20/D 1.502(lit.)
Flash point 147 °F
storage temp. Inert atmosphere,Room Temperature
solubility Chloroform (Slightly), DMSO (Slightly), Methanol (Slightly)
form Liquid
pka 2.21±0.10(Predicted)
Specific Gravity 0.990
color Clear colorless to pale yellow
PH 7 (H2O)
Odor at 0.10 % in dipropylene glycol. nutty roasted baked potato
Odor Type chocolate
Sensitive Hygroscopic
JECFA Number 766
BRN 107052
Dielectric constant 2.4399999999999999
LogP 0.64
CAS DataBase Reference 123-32-0(CAS DataBase Reference)
Substances Added to Food (formerly EAFUS) 2,5-DIMETHYLPYRAZINE
EWG's Food Scores 1
FDA UNII V99Y0MUY1Q
NIST Chemistry Reference Pyrazine, 2,5-dimethyl-(123-32-0)
EPA Substance Registry System Pyrazine, 2,5-dimethyl- (123-32-0)

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS07
Signal word  Warning
Hazard statements  H302
Precautionary statements  P301+P312+P330
Hazard Codes  Xn,Xi
Risk Statements  22-36/37/38-R22
Safety Statements  26-36
RIDADR  NA 1993 / PGIII
WGK Germany  3
RTECS  UQ2800000
Hazard Note  Irritant
TSCA  Yes
HS Code  29339990
NFPA 704
2
0

2,5-Dimethyl pyrazine price More Price(55)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich W327204 2,5-Dimethylpyrazine ≥98%, FG 123-32-0 100g $91.8 2024-03-01 Buy
Sigma-Aldrich W327204 2,5-Dimethylpyrazine ≥98%, FG 123-32-0 500g $256 2024-03-01 Buy
Sigma-Aldrich W327204 2,5-Dimethylpyrazine ≥98%, FG 123-32-0 1kg $372 2024-03-01 Buy
Sigma-Aldrich 175420 2,5-Dimethylpyrazine 98% 123-32-0 5g $41.8 2024-03-01 Buy
Sigma-Aldrich 84233 2,5-Dimethylpyrazine analytical standard 123-32-0 1ml $69.7 2022-05-15 Buy
Product number Packaging Price Buy
W327204 100g $91.8 Buy
W327204 500g $256 Buy
W327204 1kg $372 Buy
175420 5g $41.8 Buy
84233 1ml $69.7 Buy

2,5-Dimethyl pyrazine Chemical Properties,Uses,Production

Chemical Properties

2,5-Dimethylpyrazine has a characteristic odor of earthy, potato-like odor.

Chemical Properties

clear colorless to pale yellow liquid

Occurrence

Reported to be present in bakery products, roasted barley, cocoa products, roasted coffee, dairy products, pork, peanuts, pecans, filberts, popcorn, potato products, rum and whiskey, soy products; a volatile component in roasted filberts and in potato chips; reportedly identified in the fat of cooked beef; also reported found in toasted off-flavors. Also reported in cheeses, butter, boiled eggs, grilled beef, tea, barley, oats, oatmeal, soybeans, heated beans, kohlrabi, shrimp and mushrooms. Also reported found in coffee, potato chips and shrimp

Uses

2,5-Dimethylpyrazine is used as a reagent in the synthesis of bone-targeted proteasome inhibitors for multiple myeloma (MM). 2,5-Dimethylpyrazine is also used in the preparation of 3-Methyl-2,5-bis-(2-hydroxyethyl)pyrazine (M295340); a degredation product of Clavulanic Acid (C563750) which is a β-lactamase inhibitor, typically added to amoxicillin to increase its effectiveness.

Uses

2,5-Dimethyl pyrazine is used for blending food, nuts and beverage flavors.

Application

2,5-Dimethyl pyrazine is held chiefly responsible for the typical flavor of Potato Chips (oil-fried, thin-sliced Potato). It has therefore been manufactured synthetically and is used in the reconditioning of commercial products, such as Potato Chips and the packaging material for same, and also for reconditioning of "instant" coffee.

Definition

ChEBI: 2,5-Dimethylpyrazine is a member of pyrazines.

Preparation

By the interaction of acrolein and ammonia when heated in glycerol in the presence of ammonium salts; by self-condensation of aminoacetone, followed by oxidation with mercury chloride.

Aroma threshold values

Detection: 80 ppb to 1.8 ppm

Taste threshold values

Taste characteristics at 7.5 ppm: musty, potato, cocoa and nutty with a fatty and oily nuance

General Description

2,5-Dimethylpyrazine is a pyrazine compound that is mainly formed in food products such as cooked rice or roasted peanuts due to the Maillard reaction between sugars and proteins during cooking or roasting process.

Safety Profile

Moderately toxic by ingestion and intraperitoneal routes. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx

Purification Methods

Purify it via its picrate (m 150o) which is decomposed with a base (e,g, KOH) and distilled. [Wiggins and Wise J Chem Soc 4780 1956]. [Beilstein 23/5 V 403.]

1674-56-2
123-32-0
Synthesis of 2,5-Dimethyl pyrazine from (±)-1-Amino-2-propanol
Global( 555)Suppliers
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View Lastest Price from 2,5-Dimethyl pyrazine manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2,5-Dimethyl pyrazine pictures 2024-12-20 2,5-Dimethyl pyrazine
123-32-0
 US $10.00 / kg 1kg 99% 20ton Hebei Zhuanglai Chemical Trading Co.,Ltd
2,5-Dimethylpyrazine pictures 2024-11-19 2,5-Dimethylpyrazine
123-32-0
 US $91.00-39.00 / mg 99.92% 10g TargetMol Chemicals Inc.
2,5-Dimethyl pyrazine pictures 2024-11-11 2,5-Dimethyl pyrazine
123-32-0
 US $10.00-7.00 / kg 1kg 99.99% 10 tons Shandong Deshang Chemical Co., Ltd.
2,5-Dimethylpyrazine (contains 2,6-isomer) 2,5-DIMETHYL PYRAZINE, NATURAL 2,5-Dimethylpyrazine,99% 5-diMethyl pyrazine 2,5-DiMethylpyrazine, 99% 25GR 2,5-DiMethylpyrazine, 99% 5GR 2,5-Dimethylpyrazine, Research grade 2,5-Dimethyl pyrazine >=99.0% 2,5-DIMETHYLPYRAZINE FOR SYNTHESIS 2,5-DiMethyl pyrazzine Natural 2,5-DiMethyl pyrazine 2,5- twoMethyl pyrazine 2,5 AND 2,6-DIMETHYL PYRAZINE 2,5-DIMETHYL-1,4-DIAZINE 2,5-DIMETHYLPYRAZINE AND 2,6-DIMETHYLPYRAZINE 2,5(2,6)-DIMETHYLPYRAZINE MIXTURE 2,5-Dimethyl paradiazine 2 5-DIMETHYLPYRAZINE FCC 2,5-Dimethyl-p-diazine dimethylpyrazine,2,5-dimethylpyrazine,2,5-dimethyl-1,4-diazine KETINE GLYCOLINE FEMA 3272 FEMA NUMBER 3272 FEMA NUMBER 3272 AND 3273 2,5-DIMETHYLPYRAZINE (CONTAINS CA. 5% 2,6-ISOMER) 94+% 2,5-DIMETHYL PYRAZINE FEMA NO.3272 2,5-DIMETHYLPYRAZINE (CONTAINS 2,6-ISOMER) 80+% 2,3,5-TRMETHYLPYRAZINE 2,5-Dimethylpyrazine≥ 99% (GC) tomfor 2,5(or6)-Dimethyl pyrazine 2,5-Dimethylpyrazine 98+% Glipizide Impurity 17 2,5-Dimethylpyrazine > 2,5-Dimethylpyrazine, Flavour grade 2,5-Dimethylpyrazine (contains 2,6-isomer)> 2,5-Dimethyl pyrazine USP/EP/BP 2,5-dimethyl pyrazine and 2,6-dimethyl pyrazine mixture 2, 5-Dimethyl Pyrazine CAS 123-32-0 with Best Price 2.5-Dimethyl pryazine 2,5-Dimethylprazin 2,5-dimethyl-pyrazin 2,5-DIMETHYLPYRAZINE 2,5-Dimethylpiazine 2,5-Dimethyl Pyrazine,2,5-dimethyl- Structural formula Clomiphene Citrate 50-41-9 2,5-Dimethylpyrazine, Flavour grade in isooctane 2,5-Dimethylpyrazine, Research grade in isooctane Glipizide Impurity 42 123-32-0 123-23-0 3123-32-0 -NCCH3CHNCCH3CH Heterocyclic Building Blocks Pyrazines