ChemicalBook >>Dehydroacetic acid>>DHA(520-45-6)

DHA(520-45-6)

DHA(520-45-6)
Product IdentificationBack to Contents
【Product Name】

DHA
【Synonyms】

3-Acetyl-4-hydroxy-6-methyl-2h-pyran-2-one
3-Acetyl-6-methyl-2,4-pyrandione
3-Acetyl-6-methyl-2H-pyran-2,4(3H)-dione
3-Acetyl-6-methylpyran-2,4-dione
3-Acetyl-6-methylpyrandione-2,4
Dehydracetic acid
【CAS】

520-45-6
【Formula】

C8H8O4
【Molecular Weight】

168.15
【EINECS】

208-293-9
【RTECS】

UP8050000
【RTECS Class】

Agricultural Chemical and Pesticide; Tumorigen
【Merck】

13,2885
【Beilstein/Gmelin】

6129
【Beilstein Reference】

4-17-00-06699
【EC Index Number】

607-163-00-2
【EC Class】

Harmful
Physical and Chemical PropertiesBack to Contents
【Appearance】

Needles from water, rhombic needles or prisms from alcohol. Odorless.
【Solubility in water】

Very soluble
【Melting Point】

108
【Boiling Point】

333
【Vapor Pressure】

0.0001 (25 C)
【pKa/pKb】

5.39 (pKa)
【Partition Coefficient】

.35
【Heat Of Vaporization】

61.3 kJ/mol
【Usage】

Organic synthesis, as plasticizer, bactericide, fungicide, in antienzyme toothpastes, to reduce pickle bloating.
【Vapor Density】

5.8
【Refractive Index】

1.4379 (20 C)
First Aid MeasuresBack to Contents
【Ingestion】

The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
【Inhalation】

Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
【Skin】

Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush with running water for at least 20 minutes. Wash skin with soap and water.
【Eyes】

Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.
Handling and StorageBack to Contents
【Storage】

Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
【Handling】

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Hazards IdentificationBack to Contents
【Skin】

May cause burns.
【Eyes】

See Skin.
【EC Risk Phrase】

R 22
【UN (DOT)】

1325
Exposure Controls/Personal ProtectionBack to Contents
【Personal Protection】

Wear appropriate protective gloves, clothing and goggles.
【Respirators】

Wear positive pressure self-contained breathing apparatus (SCBA).
【Exposure Effects】

The toxological properties of this substance have not been fully investigated.
【Poison Class】

4
Fire Fighting MeasuresBack to Contents
【Flash Point】

151
【Fire Fighting】

Water or foam may cause frothing.
【Fire Potential】

Slight fire hazard.
Accidental Release MeasuresBack to Contents
【Small spills/leaks】

Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. With clean shovel place material into clean, dry container and cover loosely; move containers from spill area.
Stability and ReactivityBack to Contents
【Disposal Code】

4
【Stability】

Moderately volatile in steam.
【Combustion Products】

Fire may produce irritating and/or toxic gases.
Transport InformationBack to Contents
【UN Number】

1325
【Hazard Class】

4.1
【Packing Group】

II; III
【HS Code】

2932 29 80
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