CAS 18600-59-4 | CYASORB UV-3638
Molecular Formula: C22H12N2O4
Molecular Weight: 368.34
EINECS: 418-280-1
Purity: 97% Min.
Package: 100 g / 1 kg / 25 kg
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Product Introduction
Introduction
Light Stabilizer 3638 is a new generation of environmentally friendly and efficient UV absorbers. It has efficient absorption of UVB and UVC. High molecular weight, low volatility, no color stain.
It is especially suitable for the optical industry with high requirements on light transmittance and color, such as PET, PC optical material lenses, light diffusing plates for backlight liquid crystal display devices, etc.
Specification of CAS 18600-59-4 | CYASORB UV-3638
ITEMS | SPECIFICATION |
Melting point | 315-317 °C |
storage temp. | 2-8°C |
density | 1.41 g/cm3 |
Boiling point | 522.8 °C |
pka | 1.98 |
EPA Substance Registry System | 4H-3,1-Benzoxazin-4-one, 2,2'-(1,4-phenylene)bis- (18600-59-4) |
CAS DataBase Reference | 18600-59-4(CAS DataBase Reference) |
Synthesis of CAS 18600-59-4 | CYASORB UV-3638
Conditions
Stage #1: anthranilic acid; terephthaloyl chloride In N,N-dimethyl acetamide at 0 - 5℃; for 1h; Cooling with ice-methanol;
Stage #2: With acetic anhydride In N,N-dimethyl acetamide; toluene for 1.5h; Product distribution / selectivity; Heating / reflux;
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