The 7-Hydroxycoumarin, with the CAS registry number 93-35-6, is also known as Umbelliferone. It belongs to the product categories of Coumarins; Various Metabolites and Impurities; Intermediates & Fine Chemicals; Metabolites & Impurities; Pharmaceuticals; HU - HZ Environmental Standards; Metabolites Fluorescent Probes, Labels, Particles and Stains; Alphabetic; Fluorescent Labels; H; Other Fluorescent Labels; Pesticides & Metabolites. Its EINECS number is 202-240-3. This chemical's molecular formula is C₉H₆O₃ and molecular weight is 162.14. What's more, its systematic name is 7-Hydroxy-2H-chromen-2-one. Its classification code is Mutation data. This chemical should be sealed and stored in a cool and dry place. It is used as fluorescent indicator and acid-base indicator.

Physical properties of 7-Hydroxycoumarin are: (1)ACD/LogP: 1.58; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.58; (4)ACD/LogD (pH 7.4): 1.46; (5)ACD/BCF (pH 5.5): 9.31; (6)ACD/BCF (pH 7.4): 7.07; (7)ACD/KOC (pH 5.5): 171.70; (8)ACD/KOC (pH 7.4): 130.29; (9)#H bond acceptors: 3; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 46.53 Å²; (13)Index of Refraction: 1.64; (14)Molar Refractivity: 41.648 cm³; (15)Molar Volume: 115.527 cm³; (16)Polarizability: 16.511×10^-24cm³; (17)Surface Tension: 59.5 dyne/cm; (18)Density: 1.403 g/cm³; (19)Flash Point: 181.176 °C; (20)Enthalpy of Vaporization: 65.513 kJ/mol; (21)Boiling Point: 382.081 °C at 760 mmHg; (22)Vapour Pressure: 0 mmHg at 25°C.

Preparation: this chemical can be prepared by 7-acetoxy-chromen-2-one by heating. This reaction will need reagents sodium hydrogen telluride, acetic acid and solvent ethanol with the reaction time of 30 min. The yield is about 90%.

Uses of 7-Hydroxycoumarin: it can be used to produce 2,4-dihydroxy-trans-cinnamic acid at the temperature of 80 °C. It will need reagent aq. KOH with the reaction time of 1 hour. The yield is about 62%.

When you are using this chemical, please be cautious about it as the following:
It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. When using it, you need to wear suitable protective clothing.

You can still convert the following datas into molecular structure:
(1)SMILES: c1cc(cc2c1ccc(=O)o2)O
(2)Std. InChI: InChI=1S/C9H6O3/c10-7-3-1-6-2-4-9(11)12-8(6)5-7/h1-5,10H
(3)Std. InChIKey: ORHBXUUXSCNDEV-UHFFFAOYSA-N

The toxicity data is as follows: