2-Methyl-3-hydroxy-.gamma.-pyranone
3-hydroxy-2-methyl-4-pyrone
CAS: 118-71-8
Molecular Formula: C6H6O3
2-Methyl-3-hydroxy-.gamma.-pyranone - Names and Identifiers
| Name | 3-hydroxy-2-methyl-4-pyrone |
| Synonyms | Maltol 3-hydroxy-2-methyl-4-pyrone 3-Hydroxy-2-Methyl-4H-Pyran-4-One 2-Methyl-3-hydroxy-.gamma.-pyranone |
| CAS | 118-71-8 |
| EINECS | 204-271-8 |
| InChI | InChI=1/C7H8O3/c1-2-6-7(9)5(8)3-4-10-6/h3-4,9H,2H2,1H3 |
| InChIKey | XPCTZQVDEJYUGT-UHFFFAOYSA-N |
2-Methyl-3-hydroxy-.gamma.-pyranone - Physico-chemical Properties
| Molecular Formula | C6H6O3 |
| Molar Mass | 126.112 |
| Density | 1.261g/cm3 |
| Melting Point | 160-164℃ |
| Boling Point | 290.3°C at 760 mmHg |
| Flash Point | 124.8°C |
| Water Solubility | 1.2 g/100 mL (25℃) |
| Solubility | Solubility in water: 12g/L (25°C), soluble in ethanol and propylene glycol, soluble in benzene and ether in a small amount |
| Vapor Presure | 0.000228mmHg at 25°C |
| Appearance | Form Liquid, color Clear colorless |
| pKa | 8.41±0.10(Predicted) |
| PH | 5.3 (0.5g/l, H2O) |
| Storage Condition | 2-8°C |
| Refractive Index | 1.54 |
| MDL | MFCD00006578 |
| Physical and Chemical Properties | Melting point 160-164°C boiling point 170°C (10 mmHg) water-soluble 1.2g/100 mL (25°C) |
| Use | Used as food additives, flavors, can be used for tobacco flavor |
2-Methyl-3-hydroxy-.gamma.-pyranone - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | 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. S37/39 - Wear suitable gloves and eye/face protection |
| UN IDs | UN 3334 |
| WGK Germany | 3 |
| RTECS | UQ1050000 |
| TSCA | Yes |
| HS Code | 29329995 |
2-Methyl-3-hydroxy-.gamma.-pyranone - Upstream Downstream Industry
2-Methyl-3-hydroxy-.gamma.-pyranone - Reference
| Reference Show more | 1. Xu Yanyang, Zhao Yujuan, Gao Feng, Wang Erlei, Lu Hailing, Li Xuefeng, Jiang Wenwen, Chen Yan. Analysis of Polyphenols in Different Parts of Chinese Ginseng by High Performance Liquid Chromatography [J]. Food Science, 2021,42(04):240-246. |
2-Methyl-3-hydroxy-.gamma.-pyranone - Standard
Authoritative Data Verified Data
This product is 3-hydroxy-2-methyl-4-pyrone. The content of C6H603 shall not be less than 99.0% calculated as anhydrous.
Last Update：2024-01-02 23:10:35
2-Methyl-3-hydroxy-.gamma.-pyranone - Trait
Authoritative Data Verified Data
- This product is a white crystalline powder; With Coke 'hard or cream-like aroma.
- This product is soluble in ethanol or propylene glycol, and slightly soluble in water or glycerin.
melting point
The melting point of this product (General rule 0612) is 160~1 6 4 1.
Last Update：2022-01-01 11:22:27
2-Methyl-3-hydroxy-.gamma.-pyranone - Differential diagnosis
Authoritative Data Verified Data
- the solution under the content measurement was measured by ultraviolet-visible spectrophotometry (General 0401), and the maximum absorption was found at a wavelength of 274nm.
- The infrared absorption spectrum of this product should be consistent with that of the reference product (General rule 0402).
Last Update：2022-01-01 11:22:28
2-Methyl-3-hydroxy-.gamma.-pyranone - Exam
Authoritative Data Verified Data
moisture
take this product, according to the moisture determination method (General Principles 0832 first method) determination, shall not pass 0 .5%.
ignition residue
The l.O g of this product shall be taken for inspection according to law (General rule 0841), and the remaining residue shall not exceed.
Lead
lead shall not exceed 10 parts per million as determined by the methods for the determination of lead, cadmium, arsenic, mercury and copper (General rule 2321).
Heavy metals
The residue left under the item of taking the ignition residue shall not contain more than 20 parts per million of heavy metal when examined by law (General rule 0821, Law II).
arsenic salt
take this product 0. 67G, at 450-0822 T: after burning to complete Ash, take the residue, according to inspection (general principles the first law), should comply with the provisions (0. 0003%).
Last Update：2022-01-01 11:22:28
2-Methyl-3-hydroxy-.gamma.-pyranone - Content determination
Authoritative Data Verified Data
take about 50m g of this product, weigh it accurately, put it in a 250ml measuring flask, dissolve it with 0. lm o l/L hydrochloric acid solution and dilute it to the scale, shake it well. Take 5ml for precision measurement, put it in a 100ml measuring flask, use 0. Dilute lm o l/L hydrochloric acid solution to the scale, shake well, measure absorbance at the wavelength of 274nm according to UV-Vis spectrophotometry (General rule 0401), the same method of determination, that is to say.
Last Update：2022-01-01 11:22:29
2-Methyl-3-hydroxy-.gamma.-pyranone - Category
Authoritative Data Verified Data
pharmaceutical excipients, flavors and fragrances.
Last Update：2022-01-01 11:22:29
2-Methyl-3-hydroxy-.gamma.-pyranone - Storage
Authoritative Data Verified Data
sealed and protected from light.
Last Update：2022-01-01 11:22:29
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CAS: 118-71-8
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Product Name: Deferiprone Impurity 4 (Deferiprone EP Impurity B) Visit Supplier Webpage Request for quotationCAS: 118-71-8
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View History
Raw Materials for 2-Methyl-3-hydroxy-.gamma.-pyranone
Magnesium
Diethyl oxalate
ZINC
Sodium ethoxide
Oxygen
Cyclohexane
Furfural
Soy bean Isoflavone Isoflavone 10-40%
CREOSOTE
Kojic acid
Pyromeconic acid
Diethyl oxalate
ZINC
Sodium ethoxide
Oxygen
Cyclohexane
Furfural
Soy bean Isoflavone Isoflavone 10-40%
CREOSOTE
Kojic acid
Pyromeconic acid
Downstream Products for 2-Methyl-3-hydroxy-.gamma.-pyranone