Khellin

  • 4,9-Dimethoxy-7-methyl-5H-furo[3,2-g][1]benzopyran-5-one
  • 4,9-Dimethoxy-7-methyl-5-oxo-1,8-dioxabenz[f]indene
  • 4,9-Dimethoxy-7-methyl-5-oxofuro[3,2-g]-1,2-chromene
  • 5,8-Dimethoxy-2-methyl-6,7-furanochromone
  • 5,8-Dimethoxy-2-methyl-4',5'-furano-6,7-chromone
Formula
C14H12O5
Structure
Description
Light yellow crystals.
Uses
Coronary dilator.

Registry Numbers and Inventories.
CAS
82-02-0
EC (EINECS/ELINCS)
201-392-8
36/37/39 45
RTECS
LV1050000
RTECS class
Drug; Mutagen; Reproductive Effector
UN (DOT)
2811
Merck
12,5321
Beilstein/Gmelin
263185
Beilstein Reference
5-19-06-00320

Properties.
Formula
C14H12O5
Formula mass
260.25
Melting point, °C
150 - 154
Boiling point, °C
482
Vapor pressure, mmHg
2E-9 (25 C)
Density
1.44 g/cm3 (25 C)
Solubility in water
Insoluble
Heat of vaporization
74.4 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. Store at -20 C
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
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.
Flash Point,°C
219
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.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Emits toxic fumes under fire conditions.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
Toxic. Toxic if swallowed. Irritating to eyes and skin. Target organ(s): Vascular system.
   Ingestion
Toxic if swallowed.
   Inhalation
Material is irritating to mucous membranes and upper respiratory tract. May be toxic by inhalation.
   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 immediately.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of skin contact, flush with copious amounts of water for at least 15 minutes. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.
UN number
2811
Response guide
Hazard class
6,1