2-methylpyrazine
2-methylpyrazine
CAS: 109-08-0
Molecular Formula: C5H6N2
2-methylpyrazine - Names and Identifiers
| Name | 2-methylpyrazine |
| Synonyms | FEMA 3616 FEMA 3309 METHYLPYRAZINE Methylpyrazine 2-methylpyrazine FEMA NUMBER 3309 2-METHYLPYRAZINE METHYLPYRAZINE, 2- 2-Methyl-1,4-diazine 2-METHYL-1,4-DIAZINE 2-methyl-1,4-diazinen |
| CAS | 109-08-0 |
| EINECS | 203-645-8 |
| InChI | InChI=1/C5H6N2/c1-5-4-6-2-3-7-5/h2-4H,1H3 |
| InChIKey | CAWHJQAVHZEVTJ-UHFFFAOYSA-N |
2-methylpyrazine - Physico-chemical Properties
| Molecular Formula | C5H6N2 |
| Molar Mass | 94.11 |
| Density | 1.03 g/mL at 25 °C (lit.) |
| Melting Point | -29 °C (lit.) |
| Boling Point | 135 °C/761 mmHg (lit.) |
| Flash Point | 122°F |
| JECFA Number | 761 |
| Water Solubility | Fully miscible in water. |
| Vapor Presure | 9.69mmHg at 25°C |
| Appearance | Liquid |
| Color | Clear colorless to slightly yellow |
| BRN | 105778 |
| pKa | 1.45(at 27℃) |
| Storage Condition | 2-8°C |
| Refractive Index | n20/D 1.504(lit.) |
| Physical and Chemical Properties | Density 1.03 melting point -29°C boiling point 135°C (761 torr) refractive index 1.5042 flash point 50°C |
| Use | Used in the dye and pharmaceutical industry, but also as a food flavor additive |
2-methylpyrazine - Risk and Safety
| Risk Codes | R10 - Flammable R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S16 - Keep away from sources of ignition. |
| UN IDs | UN 1993 3/PG 3 |
| WGK Germany | 3 |
| RTECS | UQ3675000 |
| TSCA | Yes |
| HS Code | 29339990 |
| Hazard Class | 3 |
| Packing Group | III |
2-methylpyrazine - Upstream Downstream Industry
| Raw Materials | Ethylenediamine |
2-methylpyrazine - Reference Information
| FEMA | 3309 | 2-METHYLPYRAZINE |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | 2-methylpyrazine is a pharmaceutical intermediate, which can be prepared from ethylenediamine and 1, 2-propanediol was prepared as a raw material. 2-methylpyrazine can be used for the preparation of first-line anti-tuberculosis drug pyrazinamide and important organic chemical raw materials and pharmaceutical intermediates 2-cyanopyrazine. The product is China's GB2760-86 provisions for the use of edible spices, mainly used for the preparation of meat, chocolate, peanuts and popcorn flavor. used in the dye and pharmaceutical industries, and also used as food flavor additives assay for cobalt, cyanate and iron. Organic Synthesis. |
| content analysis | gas chromatography analysis was performed on a polar column in GT-10-4. |
| toxicity | GRAS(FEMA). LD501800 mg/kg (rat, oral). |
| usage limit | FEMA(mg/kg): soft drinks 10; Cold drinks 10; Candy 10; Baked goods 10; pudding 10; Dairy products 10; Meat, sauce, soup 10; Cereals 10. |
| production method | is derived from the catalytic dehydrogenation of 2-methylpiperazine. From the condensation of methylglyoxal and ethylenediamine. 2-methylpyrazine can be prepared by catalytic dehydrogenation of 2-methylpiperazine or by condensation of methylglyoxal with ethylenediamine. |
Last Update：2024-04-09 19:05:07
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Raw Materials for 2-methylpyrazine