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ChemicalBook >>Rhamnetin>>3,5,3',4'-Tetrahydroxy-7-methoxyflavone(90-19-7)

3,5,3',4'-Tetrahydroxy-7-methoxyflavone(90-19-7)

3,5,3',4'-Tetrahydroxy-7-methoxyflavone(90-19-7)
Product IdentificationBack to Contents
【Product Name】

3,5,3',4'-Tetrahydroxy-7-methoxyflavone
【Synonyms】

2-(3,4-Dihydroxyphenyl)-3,5-dihydroxy-7-methoxy-4H-1-benzopyran-4-one
3,3',4',5-Tetrahydroxy-7-methoxyflavone
7-Methoxyquercetin

7-O-Methylquercetin
Quercetin 7-methyl ether
【CAS】

90-19-7
【Formula】

C16H12O7
【Molecular Weight】

316.27
【EINECS】

201-974-1
【RTECS】

LK8748000
【RTECS Class】

Mutagen
【Merck】

12,8337
【Beilstein/Gmelin】

47741
【Beilstein Reference】

5-18-05-00495
Physical and Chemical PropertiesBack to Contents
【Appearance】

light yellow powder
【Solubility in water】

Insoluble
【Melting Point】

248 - 250
【Vapor Pressure】

1E-16 (25 C)
【pKa/pKb】

6.73 (pKa)
【Usage】

Has been used for dyeing wool and cotton.
【Refractive Index】

 
First Aid MeasuresBack to Contents
【Ingestion】

If swallowed, wash out mouth with water provided person is conscious. Call a physician.
【Inhalation】

If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
【Skin】

In case of contact, immediately wash skin with soap and copious amounts of water.
【Eyes】

In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.
Handling and StorageBack to Contents
【Storage】

Keep tightly closed. Store at 2-8 C
Hazards IdentificationBack to Contents
【Inhalation】

Material is irritating to mucous membranes and upper respiratory tract. May be harmful if inhaled.
【Skin】

Causes skin irritation. May be harmful if absorbed through the skin.
【Eyes】

Causes eye irritation.
【Ingestion】

May be harmful if swallowed.
【Hazards】

Emits toxic fumes under fire conditions.
【EC Risk Phrase】

36/37/38
【EC Safety Phrase】

26 36/37
Exposure Controls/Personal ProtectionBack to Contents
【Personal Protection】

Compatible chemical-resistant gloves.
【Respirators】

Government approved respirator.
【Exposure Effects】

Irritant. Irritating to eyes, respiratory system and skin.
Fire Fighting MeasuresBack to Contents
【Fire Fighting】

Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Accidental Release MeasuresBack to Contents
【Small spills/leaks】

Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Stability and ReactivityBack to Contents
【Stability】

Stable at normal temperatures and pressures.
【Incompatibilities】

Strong oxidizing agents.
【Decomposition】

Carbon monoxide, Carbon dioxide.
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