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: 2024-12-18 14:08:57
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 | n |
| 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) |
 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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