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2,2',4,4'-Tetrahydroxybenzophenone (BP-2)
Identification
Synonyms: Benzophenone-2; BP-2; Bis(2,4-dihydroxyphenyl) methanone; UV Absorber D50; Sumisorb 150; Uvinul D-50
CAS No.: 131-55-5;
EC No.: 205-028-9
Molecular Weight: 246.2155
Molecular Formula: C13H10O5
M.p.: 200~203 °C
B.p.: 531°C (1 atm)
F.p.: 289.2 °C
Structural Formula: 
Density: 1.526g/cm3
Preparation
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Application
2,2',4,4'-Tetrahydoxybenzophenone (BP-2) is applied as UV absorber in resin, plastic and rubber; a class-I sunscreen approved by US FDA.
Specification*
| Items | Specification |
|---|---|
| 2,2',4,4'-Tetrahydoxybenzophenone Assay (HPLC) | 99.0% min. |
| Color (Gardner) | 3.0 max. |
| Turbidity | 12 NTU max. |
| Loss on drying | 0.50% max. |
| m.p. | 195°C min. |
| A1/1(345nm) | 580 min. |
| Appearance | Yellow crystalline powder |
Standard Packaging
25, 50kgs/fibre or plastic drum.
Preserve under light-proof condition
Risks and Safety Information
2,2',4,4'-Tetrahydoxybenzophenone (Benzophenone-2) is not regulated by UN or US DOT as hazmat
R 22 Harmful if swallowed.
R 36/37/38 Irritating to eyes, respiratory system and skin.
S 26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S 37/39 Wear suitable gloves and eye/face protection.