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HomeProduct name list5,6,7,8-Tetrahydroquinoxaline

5,6,7,8-Tetrahydroquinoxaline

Synonym(s):Cyclohexapyrazine;Nutty quinoxaline;Tetrahydroquinoxaline

  • CAS NO.:34413-35-9
  • Empirical Formula: C8H10N2
  • Molecular Weight: 134.18
  • MDL number: MFCD00038078
  • EINECS: 252-002-8
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-11-18 18:16:58
5,6,7,8-Tetrahydroquinoxaline Structural

What is 5,6,7,8-Tetrahydroquinoxaline?

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.

Definition

ChEBI: 5,6,7,8-Tetrahydroquinoxaline is a member of pyrazines.

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.

Properties of 5,6,7,8-Tetrahydroquinoxaline

Boiling point: 85 °C3 mm Hg(lit.)
Density  1.061 g/mL at 25 °C(lit.)
refractive index  n20/D 1.542(lit.)
FEMA  3321 | 5,6,7,8-TETRAHYDROQUINOXALINE
Flash point: 195 °F
storage temp.  Sealed in dry,Room Temperature
form  clear liquid
pka 2.24±0.20(Predicted)
Specific Gravity 1.1334
color  Colorless to Yellow to Green
Odor at 0.10 % in dipropylene glycol. musty nut roasted bean cereal corn chip cheese
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 for 5,6,7,8-Tetrahydroquinoxaline

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes P261:Avoid breathing dust/fume/gas/mist/vapours/spray.
P264:Wash hands thoroughly after handling.
P264:Wash skin thouroughly after handling.
P271:Use only outdoors or in a well-ventilated area.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352:IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for 5,6,7,8-Tetrahydroquinoxaline

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