Rhamnetin

  • 7-Methoxyquercetin
  • Quercetin 7-methyl ether
  • 7-O-Methylquercetin
  • 3,3',4',5-Tetrahydroxy-7-methoxyflavone
  • 2-(3,4-Dihydroxyphenyl)-3,5-dihydroxy-7-methoxy-4H-1-benzopyran-4-one
Formula
C16H12O7
Structure
Description
light yellow powder
Uses
Has been used for dyeing wool and cotton.

Registry Numbers and Inventories.
CAS
90-19-7
EC (EINECS/ELINCS)
201-974-1
36/37/38
26 36/37
RTECS
LK8748000
RTECS class
Mutagen
Merck
12,8337
Beilstein/Gmelin
47741
Beilstein Reference
5-18-05-00495

Properties.
Formula
C16H12O7
Formula mass
316.27
Melting point, °C
248 - 250
Vapor pressure, mmHg
1E-16 (25 C)
Solubility in water
Insoluble
Refractive index
 
pKa/pKb
6.73 (pKa)

Hazards and Protection.
Storage
Keep tightly closed. Store at 2-8 C
Protection
Compatible chemical-resistant gloves.
Respirators
Government approved respirator.
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
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide.

Fire.
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.
Hazards
Emits toxic fumes under fire conditions.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
Irritant. Irritating to eyes, respiratory system and skin.
   Ingestion
May be harmful if swallowed.
   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.

First aid
 
   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.

Transport.