4-Methylumbelliferone CAS 90-33-5

Insoluble in water, slightly soluble in methanol and ethanol, readily soluble in sodium hydroxide solution

4-Methylumbelliferone Basic information
Product Name:	4-Methylumbelliferone
CAS:	90-33-5
MF:	C10H8O3
MW:	176.17
EINECS:	201-986-7
Mol File:	90-33-5.mol
4-Methylumbelliferone Chemical Properties
Melting point	188.5-190 °C(lit.)
Boiling point	267.77°C (rough estimate)
density	1.1958 (rough estimate)
refractive index	1.5036 (estimate)
storage temp.	2-8°C
solubility	Practically insoluble in water; slightly soluble in ethanol, ether,chloroform; soluble inmethanol
pka	7.79(at 25℃)
form	Crystalline Powder
color	off-white to yellow
PH Range	Green 1 uorescent (0.0) to weak blue 1 uorescent (2.0);Weak blue 1 uorescent (6.5) blue 1 uorescent (8.0)
Water Solubility	slightly soluble
λmax	221nm, 251nm, 322nm
Merck	144,854
BRN	142217
Stability:	Stable. Combustible. Incompatible with strong oxidizing agents.
InChI	1S/C10H8O3/c1-6-4-10(12)13-9-5-7(11)2-3-8(6)9/h2-5,11H,1H3
InChIKey	HSHNITRMYYLLCV-UHFFFAOYSA-N
SMILES	CC1=CC(=O)Oc2cc(O)ccc12
LogP	2.370 (est)
CAS DataBase Reference	90-33-5(CAS DataBase Reference)
NIST Chemistry Reference	Coumarin, 7-hydroxy-4-methyl-(90-33-5)
EPA Substance Registry System	4-Methylumbelliferone (90-33-5)

Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

FAQ From Customers

Q1: What is the minimum order quantity?

A: There is no quantity limit for the first sample or trial order. Just tell us the actual quantity you need.
Q2: How can I confirm that the quality meets the requirements?

A: Provide your specifications, and our technical team will check them or customize them for you; we can provide TDS, MSDS, and COA, and accept third-party testing.
Q3: How do you ensure stable quality?

A: We manufacture under an ISO 9001 quality system, test every batch before release, and retain samples for 24 months for traceability.
Q4: Do you provide samples?

A: Yes — Free samples are available; freight is at buyer's expense for express delivery.