ChemicalBook >> CAS DataBase List >>Octabenzone


Chemical Name:
UV-531;BP-12;uv1;531;CHIMASSORB 81;BENZOPHENONE-12;2-HYDROXY-4-(OCTYLOXY)BENZOPHENONE;uf4;Hostavin ARO 8;UV absorber 531
Molecular Formula:
Molecular Weight:
MOL File:
MSDS File:

Octabenzone Properties

Melting point 47-49 °C(lit.)
Boiling point 424.46°C (rough estimate)
Density 1.160g/cm3
refractive index 1.6000 (estimate)
Flash point 102℃
storage temp. Sealed in dry,Room Temperature
solubility Chloroform (Slightly), Methanol (Slightly, Sonicated)
form Solid
pka 7.59±0.35(Predicted)
color Off-White to Light Yellow Low-Melting
Specific Gravity 1.160
Merck 14,6742
BRN 1915198
CAS DataBase Reference 1843-05-6(CAS DataBase Reference)
Indirect Additives used in Food Contact Substances 2-HYDROXY-4-N-OCTOXY-BENZOPHENONE
FDA 21 CFR 178.2010
EWG's Food Scores 2
NIST Chemistry Reference Octabenzone(1843-05-6)
EPA Substance Registry System 2-Hydroxy-4-octyloxybenzophenone (1843-05-6)


Risk and Safety Statements

Signal word  Warning
Hazard statements  H315-H319-H317
Precautionary statements  P264-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P280
Hazard Codes  Xi,N
Risk Statements  36/37/38-50/53-43
Safety Statements  26-36-61-60-36/37
RIDADR  UN 3077 9/PG 3
WGK Germany  1
RTECS  DJ1595000
HS Code  29145090
Toxicity LD50 oral in rat: > 10gm/kg

Octabenzone price More Price(22)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 413151 2-Hydroxy-4-(octyloxy)benzophenone 98% 1843-05-6 100g $65.8 2022-05-15 Buy
TCI Chemical H0288 2-Hydroxy-4-n-octyloxybenzophenone >98.0%(GC) 1843-05-6 25g $20 2022-04-27 Buy
TCI Chemical H0288 2-Hydroxy-4-n-octyloxybenzophenone >98.0%(GC) 1843-05-6 500g $123 2022-04-27 Buy
Alfa Aesar L11750 2-Hydroxy-4-n-octyloxybenzophenone, 99% 1843-05-6 100g $35.4 2021-12-16 Buy
Alfa Aesar L11750 2-Hydroxy-4-n-octyloxybenzophenone, 99% 1843-05-6 25g $17.9 2021-12-16 Buy
Product number Packaging Price Buy
413151 100g $65.8 Buy
H0288 25g $20 Buy
H0288 500g $123 Buy
L11750 100g $35.4 Buy
L11750 25g $17.9 Buy

Octabenzone Chemical Properties,Uses,Production


Octabenzone is a UV absorber/screener. It is used to protect polymers (e.g., polyethylene, polypropylene, polyvinylchloride) against damage by UV light. Colorless crystals; Light yellow powder.
Stable under recommended storage conditions.


UV Absorber 531 is an ultraviolet light absorber (UVA) of the benzophenone class, imparting good light stability when used in combination with a hindered amine light stabilizer (HALS) of the Chimassorb, Tinuvin® or Uvinul® range. It shows good compatibility with polyolefins and plasticized PVC.


The main application of UV Absorber 531 is in combination with a HALS the
light stabilization of low density and linear low density polyethylene as well
as ethylene-vinyl acetate copolymers for agricultural films. It can be used as
well as a UV barrier to protect the contents of packages for both industrial
and consumer applications. Also, in combination with HALS, UV Absorber 531
can be used in high density polyethylene molded articles, e. g. in crates.
UV Absorber 531 also protects a number of other polymers against degradation
caused by light exposure such as plasticized PVC and rubbers.
UV Absorber 531 can be used in combination with antioxidants, phosphites
and other light stabilizers.

Physical properties


Adsorbents and absorbents;
Paint additives and coating additives not described by other categories
Processing aids, not otherwise listed
Air Care Products
Building/Construction Materials not covered elsewhere
Fabric, Textile, and Leather Products not covered elsewhere
Furniture and Furnishings not covered elsewhere
Paints and Coatings
Plastic and Rubber Products not covered elsewhere


UV Absorber 531 is particularly suitable for thick films, typically > 100 μm and thick sections. The low vapor pressure of UV Absorber 531 prevents losses during processing. Low migration rates reduce the risk of blooming.

Analytic Laboratory Methods

Migration of photo stabilizers from plastics was studied in model elution expt where the plastics were placed at different temp 20 and 45 degree in different solvents, e.g. H2O, acetic acid,  sunflower oil, heptane, and the amt of photostabilizer eluted was determined by spectrophotometry and by gas chromatography. The elution of 2-hydroxy-4-n-octyloxybenzophenone depended on the type of plastic. Elution was low in polystyrene and high in polyolefins, polyethylene. Food contamination from these plastic additives is discussed.

Guidelines for use

Handling & Safety

In accordance with good industrial practice, handle with care and avoid
unnecessary personal contact. Avoid continuous or repetitive breathing of
dust. Use only with adequate ventilation. Protect skin. Avoid dust formation
and ignition sources.
For more detailed information please refer to the material safety data sheet.




Octabenzone appears as light yellow/yellowish crystals/fine powder and is odourless and freely soluble in benzene, n-hexane, and acetone; slightly soluble in ethanol; and very slightly soluble in ethane dichloride. Octabenzone is a light stabiliser with good performance, capable of absorbing the UV radiation of 240–340 nm wavelength with the characteristics of light colour, non-toxicity, good compatibility, small mobility, easy processing, etc. Octabenzone protects the polymer to its maximum extent and helps to reduce its colour. It can also delay the yellowing and impede the loss of its physical function. Industrial applications of octabenzone is very extensive and applied to PE, PVC, PP, PS, PC, organic glass, polypropylene fibre, ethylene-vinyl acetate, etc. Also, octabenzone has very good light-stability effect on drying phenol aldehyde, varnish of alcohol and acname, polyurethane, acrylate, expoxnamee, etc. The major uses include UV stabiliser, for example, polyethylene and polypropylene fibres.

Chemical Properties

Light yellow powder


To stabilize polyethylene against deterioration by ultraviolet light.


HOBPs are UV absorbers for insulating plastics, which can be incorporated with active layers to increase the stabilization of organic solar cells (OSCs). It may be incorporated in parylene C films to enhance the light stability, which can be potentially used as a moisture transfer membrane for electronic boards and photovoltaics.


Preparation by reaction of n-octyl chloride with 2,4-di-hydroxybenzophenone,
? in the presence of a mixture of sodium carbonate, triethylamine and potassium iodide in refluxing butanol for 15 h (90%);
? in the presence of potassium carbonate in cyclohexanone at 145° for 5 h (66%);
? in the presence of potassium hydroxide and antimony triiodide in diethylene glycol at 150° for 1 h (93%);
? in the presence of sodium bicarbonate and potassium iodide in 1-methylpyrrolidone for 2 h at 150° (96%).

General Description

2-Hydroxy-4-(octyloxy)benzophenone (HOBP) is a UV based absorber that has 2-hydroxybenzophenone as a functional group. It can be used to enhance the light fastness of polymers using UV absorbers with sulfur and phosphorus compounds.

Octabenzone Preparation Products And Raw materials

Global( 479)Suppliers
Supplier Tel Email Country ProdList Advantage
Jinjiangchem Corporation
512-50133713 CHINA 1073 58
Yantai Suny Chem Int'l Co.,Ltd
0535-6622355 +8613606382686 CHINA 79 58
+8618020010126 China 43 58
Shanghai Bojing Chemical Co.,Ltd.
+86-21-37122233 +86-13795318958 China 497 55
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 China 22021 55
Hangzhou FandaChem Co.,Ltd.
+8615858145714 China 9382 55
21-51619050 China 26815 60
Anhui Royal Chemical Co., Ltd.
+86-25-86655873 +8613962173137 China 536 55
Hefei TNJ Chemical Industry Co.,Ltd.
0551-65418679 China 2995 55
Tianjin Zhongxin Chemtech Co., Ltd.
022-66880623 +8618622897568 China 547 58

View Lastest Price from Octabenzone manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2022-04-13 Octabenzone
US $11.00 / KG 1KG 99% 50MT Hebei baicao biology science and technology co., ltd
2022-02-24 Octabenzone
US $0.00 / Kg/Drum 1KG 99.9% 100000kg per month Wuhan Mulei New Material Technology Co. Ltd
2022-01-17 Light Stabilizer UV-Absorber RIASORB UV531
US $0.00 / KG/CTN 500KG 99% 20 tons RIANLON CORPORATION
  • Octabenzone
  • US $11.00 / KG
  • 99%
  • Hebei baicao biology science and technology co., ltd
  • Octabenzone
  • US $0.00 / Kg/Drum
  • 99.9%
  • Wuhan Mulei New Material Technology Co. Ltd
[2-Hhydroxy-4-(octyloxy)phenyl]phenylmethanone 2-HYDROXY-4-N-OCTOXYBENZOPHENONE 2-HYDROXY-4-(OCTYLOXYL)-BENZOPHENONE Octabenzone (2-hydroxy-4-(octyloxy)phenyl)phenyl-methanon aduvex248 advastab46 anti-uvp Benzon OO benzonoo Benzophenone, 2-hydroxy-4-(octyloxy)- biosorb130 carstab700 Cyasorb UV 531 cyasorbuv531 UltravioletabsorbentUV-531 UV 1 uv1(ultrovioletabsorber) uva1 Uvinul 408 uvinul408 uvinulm408 (2-hydroxy-4-octoxy-phenyl)-phenyl-methanone (2-hydroxy-4-octoxyphenyl)-phenylmethanone UV-531,BP-12 UV-531(2-Hydroxy-4-n-octyloxybenzophenone) Hydroxy-4-(octyloxy)benzoph Ultraviolet Absorbent UV-531(BP-12) 2-hydroxy -4-octylethoxybenzophenonetwo 2-Hydroxy-4-n-octyloxybenzophenone , 98.0%(GC&T 2-Hhydroxy-4-(octyloxy)phenyl]phenylmethanone UV-531 2-Hydroxy-4-n-octoybenzophenone(BP-12) (2-hydroxy-4-(octyloxy)phenyl)phenylmethanone [2-Hydroxy-4-(octyloxy)phenyl]phenyl- [2-hydroxy-4-(octyloxy)phenyl]phenyl-methanon [2-Hydroxy-4-(octyloxy)phenyl]phenylmethanone [2-hydroxy-4-(octyloxy)phenyl]phenyl-Methanone 2-Benzoyl-5-(Octyloxy)phenol 2-benzoyl-5-octyloxyphenol 2-Hydroxy-4-(octoxy)benzophenone 2-hydroxy-4-(octyloxy)-benzophenon 2-hydroxy-4-0ctyloxybenzophenone 2-hydroxy-4-octoxybenzophenone 2-Hydroxy-4-oktyloxybenzofenon 4-(n-Octyloxy)-2-hydroxybenzophenone 4-(Octoxy)-2-hydroxybenzophenone 4-(Octyloxy)-2-hydroxybenzophenone 4-n-octyloxy-2-hydroxybenzophenone 4-octoxy-2-hydroxybenzophenone 4-octyloxy-2-hydroxybenzophenone Lankromark LE285 Lowilite 22 mark1413 Methanone, [2-hydroxy-4-(octyloxy)phenyl]phenyl- Octabenzon rhodialuxp sanduvor3035 seikalizere
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