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| CAS No.: | 90-33-5 |
|---|---|
| Name: | 4-Methylumbelliferone |
| Article Data: | 217 |
| Molecular Structure: | |
|
|
|
| Formula: | C10H8O3 |
| Molecular Weight: | 176.18 |
| Synonyms: | Coumarin,7-hydroxy-4-methyl- (8CI);Umbelliferone, 4-methyl- (6CI);4-MU;4-Methyl-7-hydroxycoumarin;7-Hydroxy-4-methyl-2-chromenone;7-Hydroxy-4-methyl-2-oxo-3-chromene;7-Hydroxy-4-methyl-2H-1-benzopyran-2-one;7-Hydroxy-4-methyl-2H-chromen-2-one;7-Hydroxy-4-methylcoumarin;Bilcolic;Bilicante;Biliton H;Cantabilin;Cantabiline;Cholestil;Cholonerton;Cholspasmin;Coumarin 4;Cumarote C;Eurogale;Hymecromone;Imecromone;Medilla;Mendiaxon;NSC 9408;Omega127;Pilot 447; |
| EINECS: | 201-986-7 |
| Density: | 1.319 g/cm3 |
| Melting Point: | 188.5-190 °C(lit.) |
| Boiling Point: | 377.4 °C at 760 mmHg |
| Flash Point: | 174.5 °C |
| Solubility: | slightly soluble in water |
| Appearance: | off-white to yellow crystals |
| Hazard Symbols: |
 Xi, Xn
|
| Risk Codes: | 36/37/38-20/21/22 |
| Safety: | 26-37/39-36 |
| PSA: | 50.44000 |
| LogP: | 1.80700 |
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Chemistry
Detail of 4-METHYL-7-HYDROXYCOUMARIN (90-33-5).
Molecular Structure:
Name:4-METHYL-7-HYDROXYCOUMARIN
CAS Number:90-33-5
Molecular Formula:C10H8O3
Molecular Weight:176.18
EINECS:201-986-7
Melting Point:186-191 oC
Solubility:slightly soluble
Appearance:solid
Properties:Needles from EtOH.
color:off-white to yellow
Water Solubility:slightly soluble
Merck:14,4854
BRN:142217
CAS DataBase Reference:90-33-5(CAS DataBase Reference)
NIST Chemistry Reference:90-33-5(NIST)
EPA Substance Registry System:90-33-5(EPA Substance)
Synonyms of 4-METHYL-7-HYDROXYCOUMARIN (90-33-5):2H-1-Benzopyran, 7-hydroxy-4-methyl-2-oxo-;2H-1-Benzopyran-2-one, 7-hydroxy-4-methyl-;2H-1-Benzopyren-2-one, 7-hydroxy-4-methyl-;4-Methylumbelliferon;4-Metylumbelliferone;7-hydroxy-4-methyl-2h-1-benzopyran-2-on;7-Hydroxy-4-methyl-2H-1-benzopyran-2-one;7-hydroxy-4-methyl-2h-1-benzopyren-2-on
Uses
Standard for the fluorometric determination of enzyme activity. Highly fluorescent in alkaline solution. Fluorescence: max Abs. l = 360nm, max. Em. l = 449nm; pH >
Toxicity Data With Reference
| 1. | orl-rat TDLo:3850 mg/kg | KSRNAM Kiso to Rinsho. Clinical Report. 5 (1971),1619. | ||
| 2. | ipr-rat LD50:2550 mg/kg | KSRNAM Kiso to Rinsho. Clinical Report. 5 (1971),1619. | ||
| 3. | scu-rat LD50:7200 mg/kg | KSRNAM Kiso to Rinsho. Clinical Report. 5 (1971),1619. | ||
| 4. | orl-mus LD50:2850 mg/kg | KSRNAM Kiso to Rinsho. Clinical Report. 5 (1971),1619. | ||
| 5. | ipr-mus LD50:1750 mg/kg | KSRNAM Kiso to Rinsho. Clinical Report. 5 (1971),1619. |
Consensus Reports
Safety Profile
Safety Information of 4-METHYL-7-HYDROXYCOUMARIN (90-33-5).
Hazard Codes:Xi,Xn
Risk Statements:36/37/38-20/21/22
Safety Statements:26-37/39-36
WGK Germany:2
RTECS:GN7000000
Hazard Note:Irritant
Specification
Stability and Reactivity of 4-METHYL-7-HYDROXYCOUMARIN (90-33-5).
Chemical Stability: Stable under normal temperatures and pressures.
Conditions to Avoid: Incompatible materials.
Incompatibilities with Other Materials Strong oxidizing agents, strong acids, strong bases.
Hazardous Decomposition Products Carbon monoxide, oxides of nitrogen, carbon dioxide.
Hazardous Polymerization Will not occur.
First Aid Measures of 4-METHYL-7-HYDROXYCOUMARIN (90-33-5).
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin: Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion: Get medical aid. Wash mouth out with water.
Inhalation: Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician: Treat symptomatically and supportively.
Handling and Storage of 4-METHYL-7-HYDROXYCOUMARIN (90-33-5).
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Storage: Store in a cool, dry place. Store in a tightly closed container.