Product Identification

Product Name

3-Hydroxy-2-methyl-4H-pyran-4-one

Synonyms

2-Methyl-3-hydroxy-4-pyrone
2-Methyl-3-hydroxypyran-4-one
3-Hydroxy-2-methyl-4H-pyran-4-one
3-Hydroxy-2-methyl-4-pyrone
Larixic acid
Palatone

CAS

118-71-8

Formula

C6H6O3

Molecular Weight

126.11

EINECS

204-271-8

RTECS

UQ1050000

RTECS Class

Drug; Mutagen; Primary Irritant

Merck

13,5735

Beilstein/Gmelin

112169

Beilstein Reference

5-18-01-00114

EC Class

harmful

Physical and Chemical Properties

Appearance

White crystalline powder with a fragrant caramel-butterscotch odor.

Solubility in water

Slightly soluble

Boiling Point

285

Vapor Pressure

0.0003 (25 C)

Density

1.453 g/cm3

pKa/pKb

8.59 (pKa)

Partition Coefficient

1.16

Heat Of Vaporization

60.8 kJ/mol

Usage

Flavoring agent, to impart freshly bakedâ odor and flavor to bread and cakes.

First Aid Measures

Ingestion

Get medical aid. Wash mouth out with water.

Inhalation

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Skin

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Eyes

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Handling and Storage

Storage

Store in a cool, dry place. Store in a tightly closed container.

Handling

Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.

Hazards Identification

Ingestion

Harmful if swallowed.

Inhalation

Causes respiratory tract irritation.

Skin

Causes skin irritation.

Eyes

Causes eye irritation.

EC Risk Phrase

R 22

EC Safety Phrase

S 22 36/37

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Fire Fighting Measures

Flash Point

127

Autoignition

740

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container.

Stability and Reactivity

Disposal Code

3

Stability

Stable.

Incompatibilities

Strong oxidizing agents

Decomposition

Carbon monoxide, carbon dioxide.

Transport Information

HS Code

2932 99 95