WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 461970

CAS#: 3147-75-9

Description: Octrizole is a UV stabilizer within products to increase stability to light. It protects polymers as well as organic pigments from UV radiation helping to preserve the original appearance and physical integrity of polymeric systems; particularly in polyesters, polyvinyl chlorides, styrenics, acrylics, polycarbonates and polyvinyl butyral during outdoor weathering.

Chemical Structure

CAS# 3147-75-9

Theoretical Analysis

MedKoo Cat#: 461970
Name: Octrizole
CAS#: 3147-75-9
Chemical Formula: C20H25N3O
Exact Mass: 323.1998
Molecular Weight: 323.44
Elemental Analysis: C, 74.27; H, 7.79; N, 12.99; O, 4.95

Price and Availability

Size Price Availability Quantity
25.0mg USD 1300.0 2 Weeks
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Synonym: Octrizole; Octrizolum; Tinuvin 329; UV Absorber-5; Cyasorb UV 5411

IUPAC/Chemical Name: 2-(benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol


InChi Code: InChI=1S/C20H25N3O/c1-19(2,3)13-20(4,5)14-10-11-18(24)17(12-14)23-21-15-8-6-7-9-16(15)22-23/h6-12,24H,13H2,1-5H3

SMILES Code: OC1=CC=C(C(C)(C)CC(C)(C)C)C=C1N2N=C3C(C=CC=C3)=N2

Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >3 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 323.44 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1: Apel C, Tang J, Ebinghaus R. Environmental occurrence and distribution of organic UV stabilizers and UV filters in the sediment of Chinese Bohai and Yellow Seas. Environ Pollut. 2018 Apr;235:85-94. doi: 10.1016/j.envpol.2017.12.051. Epub 2017 Dec 21. PubMed PMID: 29275272.


25.0mg / USD 1300.0