Product Name: 5,6,7,8-Tetrahydroquinoxaline
Synonyms: 5,6,7,8-tetrahydro-quinoxalin;Quinoxaline, 5,6,7,8-tetrahydro-;FEMA 3321;FEMA NUMBER 3321;CYCLOHEXAPYRAZINE;5,6,7,8-TETRAHYDROQUINOXALINE;TETRAHYDROQUINOXALINE;5,6,7,8-Tetrahydroquioxaline
CAS: 34413-35-9
MF: C8H10N2
MW: 134.18
EINECS: 252-002-8
Product Categories: Flavor;Pyrazine compounds
Mol File: 34413-35-9.mol

5,6,7,8-Tetrahydroquinoxaline Chemical Properties
Boiling point  85 °C3 mm Hg(lit.)
density  1.061 g/mL at 25 °C(lit.)
FEMA  3321 | 5,6,7,8-TETRAHYDROQUINOXALINE
refractive index  n20/D 1.542(lit.)
Fp  195 °F
pka 2.24±0.20(Predicted)
Specific Gravity 1.1334
Water Solubility  slightly soluble
JECFA Number 952
BRN  957053
CAS DataBase Reference 34413-35-9(CAS DataBase Reference)
NIST Chemistry Reference 5,6,7,8-Tetrahydroquinoxaline(34413-35-9)
EPA Substance Registry System Quinoxaline, 5,6,7,8-tetrahydro- (34413-35-9)

Safety Information
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-24/25-36
WGK Germany  3
TSCA  Yes
HS Code  29339900

Chemical Properties CLEAR VERY SLIGHTLY YELLOW LIQUID
Occurrence Reported found in cocoa, coffee, wheat bread, fried cured pork, pork liver, cocoa, coffee, roasted filbert, roasted peanut and roasted sesame seeds.
Preparation By condensation of alicyclic α, β-diketone with an α, β-diamine; condensation of an acyclic α, β-diamine with an α, β-dicarbonyl.
Aroma threshold values Aroma characteristics at 1.0%: nutty roasted corn chip, peanut, hazelnut, toasted coconut, coffee, graham cracker, popcorn, toasted and roasted grain.
Taste threshold values Taste characteristics from 5 to 10 ppm: roasted nutty, corn and popcorn, toasted grain and corn chip, taco fatty, basmati rice, hazelnut and roasted coffee-like. Taste characteristics at 10 ppm: nutty, musty, corn taco and popcorn-like.

Product Name: 5,6,7,8-Tetrahydroquinoxaline
Synonyms: 5,6,7,8-tetrahydro-quinoxalin;Quinoxaline, 5,6,7,8-tetrahydro-;FEMA 3321;FEMA NUMBER 3321;CYCLOHEXAPYRAZINE;5,6,7,8-TETRAHYDROQUINOXALINE;TETRAHYDROQUINOXALINE;5,6,7,8-Tetrahydroquioxaline
CAS: 34413-35-9
MF: C8H10N2
MW: 134.18
EINECS: 252-002-8
Product Categories: Flavor;Pyrazine compounds
Mol File: 34413-35-9.mol

5,6,7,8-Tetrahydroquinoxaline Chemical Properties
Boiling point  85 °C3 mm Hg(lit.)
density  1.061 g/mL at 25 °C(lit.)
FEMA  3321 | 5,6,7,8-TETRAHYDROQUINOXALINE
refractive index  n20/D 1.542(lit.)
Fp  195 °F
pka 2.24±0.20(Predicted)
Specific Gravity 1.1334
Water Solubility  slightly soluble
JECFA Number 952
BRN  957053
CAS DataBase Reference 34413-35-9(CAS DataBase Reference)
NIST Chemistry Reference 5,6,7,8-Tetrahydroquinoxaline(34413-35-9)
EPA Substance Registry System Quinoxaline, 5,6,7,8-tetrahydro- (34413-35-9)

Safety Information
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-24/25-36
WGK Germany  3
TSCA  Yes
HS Code  29339900

Chemical Properties CLEAR VERY SLIGHTLY YELLOW LIQUID
Occurrence Reported found in cocoa, coffee, wheat bread, fried cured pork, pork liver, cocoa, coffee, roasted filbert, roasted peanut and roasted sesame seeds.
Preparation By condensation of alicyclic α, β-diketone with an α, β-diamine; condensation of an acyclic α, β-diamine with an α, β-dicarbonyl.
Aroma threshold values Aroma characteristics at 1.0%: nutty roasted corn chip, peanut, hazelnut, toasted coconut, coffee, graham cracker, popcorn, toasted and roasted grain.
Taste threshold values Taste characteristics from 5 to 10 ppm: roasted nutty, corn and popcorn, toasted grain and corn chip, taco fatty, basmati rice, hazelnut and roasted coffee-like. Taste characteristics at 10 ppm: nutty, musty, corn taco and popcorn-like.