UV-928 CAS 73936-91-1

Ultraviolet absorber UV-928 (CAS No. 73936-91-1) is a benzotriazole-based ultraviolet absorber with the chemical name 2-(2H-benzotriazole-2-yl)-6-(1-methyl-1-phenethyl)-4-(1,1,3, 3-tetramethylbutylphenol). ‌
Its molecular formula is C₂₉H₃₅N₃O, with a molecular weight of 441.60. It appears as white to light yellow granular crystalline powder and has a density of 1.07. This substance has a melting point range of 108-110°C and possesses a broad ultraviolet absorption characteristic, capable of absorbing ultraviolet rays in the 270-380nm band, with absorption peaks located at 303nm and 343nm. ‌

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Model:
73936-91-1
Brand:
futurechemical
Code:
73936-91-1

Product Description

UV absorber-928 Basic information
Description Uses
Product Name:	UV absorber-928
CAS:	73936-91-1
MF:	C29H35N3O
MW:	441.61
EINECS:	422-600-5
Mol File:	73936-91-1.mol
UV absorber-928 Chemical Properties
Melting point	112 °C
Boiling point	555.5±60.0 °C(Predicted)
density	1.07
solubility	soluble in Toluene
pka	8.05±0.50(Predicted)
form	powder to crystal
color	White to Orange to Green
InChI	InChI=1S/C29H35N3O/c1-27(2,3)19-28(4,5)21-17-22(29(6,7)20-13-9-8-10-14-20)26(33)25(18-21)32-30-23-15-11-12-16-24(23)31-32/h8-18,33H,19H2,1-7H3
InChIKey	UZUNCLSDTUBVCN-UHFFFAOYSA-N
SMILES	C1(O)=C(C(C)(C2=CC=CC=C2)C)C=C(C(C)(C)CC(C)(C)C)C=C1N1N=C2C=CC=CC2=N1
EPA Substance Registry System	Phenol, 2-(2H-benzotriazol-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)- (73936-91-1)

UV-928 73936-91-1 C29H35N3O Light stabilizer Rubber and plastic anti-aging agent UV shielding agent

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.