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Application: a common laser dye, photosensitive sensitizer
7-Diethylamino-4-methylcoumarin (C1) is a dual-chromophore fluorescent laser dye with laser action at 460nm. Terbium-based metal-organic framework materials can be used to dope C1, and their potential use is ratiometric temperature sensing. C1 can also be used as a fluorescent initiator and as a fluorescent whitening agent for the synthesis of light-emitting diode (LED)-based hydrogels.

Product name:Optical Brightener ER-I
Chemical name: 1.4-Bis-o-cyanostyryl-benzene
Structure:

Formula: C24H16N2
Molecular Weight: 332
C.I.Number: 199
Appearance: Greenish yellow crystalline powder
Melting Point: 230±2  ℃
Purity: 99.0%

- Medicinal high quality asenapine
- Integrated production and trading from reputable factories
- Highlighted physical and chemical properties and advantages
- Widely used in pharmaceutical industry
- Detailed product information to help make informed decisions

- High-quality baloxavir intermediates for pharmaceutical industry
- Important precursor for the synthesis of baloxavir
- Improve drug purity and efficiency
- Manufactured and supplied by reputable manufacturing and trading integrated factory

- High-quality intermediates for the production of ivabradine hydrochloride
- An important part of the pharmaceutical industry
- Produced and traded by reputable factories with comprehensive production and trading capabilities

- High-quality pharmaceutical ingredients for a variety of applications
- Manufactured by reputable factories with comprehensive production and trading capabilities
- Ideal for use in the pharmaceutical industry

Chemical name: 2-(2'-Hydroxy-5'-methylphenyl)-benzotriazole
CAS NO:2440-22-4

Introduction:
UV-P is a benzotriazole type UV absorber. It has a high absorption in the wavelength
of 270~340nm. It is also efficient for the light stabilization of polyvinyl chloride, unsaturated
polyurethane, polystyrene, coatings and lacquers.
Specification:
Appearance: white to yellowish crystal powder
Melting Point: 128~131℃
Content (HPLC) : 99% Min.
Transmittance: 440nm≥98%   500nm≥99%
Ash: 0.1% Max.
Volatiles: 0.5% Max.

Property:
Odorless, don’t bring smell to polymers.
Insensitive to metal ion
Non-flammable, non-explosion, non-toxic, harmless to health.
Very high photo stability for its strong ability to absorb light especially in UV region (270~340nm)
Very stable to heat and can be used in plastic which require high processing temperature.

Chemical Name：2,2'-(1, 4-phenylene) di4h-3, 1-benzoxazine-4-one
Molecular formula：C22H12N2O4
Molecular weight：368.34
Structural formula：
 
CAS NO：18600-59-4
Content：more than 99%
Melting point：310-315℃
Ash content：less than 0.1%
Volatile matter：less than 0.3%

Chemical name：Hexadecyl 3,5-bis-tert-butyl-hydroxybenzoate
Molecular formula：C31H54O3
Molecular weight：474.8
Structural formula：
 
CAS NO：67845-93-6
Melting point：59.0-66.0℃
Content (GC) ：≥98.5%
Volatile matter：≤0.5%
Ash content：≤0.2%
Appearance：White powder
Purpose：This product is an excellent light stabilizer, low volatility, small coloring, good chemical stability, acid and alkali resistance. Suitable for PP and PE polyolefin plastics, the general dosage is 0.25 ~ 0.1%. This product can be used alone or with benzophenone UV stabilizer or phosphite ester antioxidant, showing good synergistic effect.

Chemical Name: 2-(4,6-Diphenyl-1,3,5-triazin-2-yl)-5-[(hexyl)oxy]-phenol
Molecular Formula C25H27N3O2
Molecular Weight 425.25
CAS NO.: 147315-50-2Applications: Triazine type UV light absorber has very low volatility , but has good compatibility with other additives. As the ultraviolet absorption agent , it is available to acrylate , PVC , polyester and polyethylene high capability polymer etc.
Specification:
Appearance Lightly yellow powder
Assay ≥ 99%
Melting point 148-150°C
Loss on drying ≤ 0.1%
Ash ≤ 0.05%
PSD＞4000um ≤ 1.0%
Transmittance(2%Toluene solution) 450nm≥ 88%, 500nm≥ 98.5%
Solubility :soluble in chloroform, diphenylmethane, methylbenzene, ethyl acetate, slightly soluble in hexyl alcohol, ethanol.
Storage and transportation :
The chemical stability is good. It can be stored and transported according to the general chemical matter regulation.
Packing: 25kg cartons or durm(PE plastic inside)

Chemical name : 2-Hydroxy-4-n-octoxybenzophenone
Introduction : UV- 531 is an ultraviolet light absorber (UVA) of the benzophenone class, imparting good light stability for plastics and other organic polymers. Due to its highly effective broad UV absorption properties and excellent polymer compatibility, UV- 531 offers maximum polymer protection and low color contribution, retards yellowing and loss of physical properties.
CAS NO : 1843-05-6
 Formula : C21H26O3
Structure :

Specification:
Appearance : light yellow powder
Melting Range : 47-49 °C
Assay : 99% Min.
Volatile Matter : < 0.5% Max.
Transmissirity: 450nm≥ 95 %，500nm≥ 97%

Chemical name : 2- (2'-Hydroxy-5'-tert-octylphenyl)benzotriazole 
Formula : C20H25N3O
Molecular Weight : 323
CAS NO : 3147-75-9
Specification:
Appearance : white powder
Assay: 99%Min
Melting Range : 103-105 °C
Transmittance:  @440nm≥ 97 %；@500nm≥ 98%
Ash: 0.1%Max
Loss on drying: 0.5%Max
Introduction : UV-329 is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers. UV-329 is an effective light stabilizer for a variety of plastics and other organic substrates.
Solubility At 20 °C (g/100ml solvent)

Chemical name：2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Molecular formula：C22H29N3O
Molecular weight：351.5
Structural formula：
 
CAS NO：21615-48-6
Content：≥99%
Melting point：80-83℃
Dry weight loss：≤0.5%
Ash content：≤0.1%
Appearance：White - light yellow powder
Solubility：Dissolved in benzene, toluene, styrene, cyclohexane, methyl methacrylate, ethyl acetate, ketone and other organic solvents.
Transmittance：460nm≥97%; 500nm≥98%
Features and Uses：Uv-328 is an efficient UV absorber with a maximum UV absorption peak of 345nm. Its photostability is similar to that of UV-326 and UV-327. However, it has a good miscibility with resins, low thermal volatilization, and high scrubber resistance. The general dosage is about 1%. It also has excellent light stabilization effect in various coatings.
Packing：20 or 25 kg cardboard drum or carton packing.

Important points about UV absorbers:
UV absorbers are compounds added to materials to protect them from the harmful effects of ultraviolet (UV) radiation. Ultraviolet radiation from the sun can cause serious damage to a variety of materials, including plastics, paints, textiles, and even human skin. The primary function of UV absorbers is to absorb UV rays and dissipate them as low levels of heat, thereby preventing degradation or other harmful effects of UV radiation.

Chemical name: 2-(2'-Hydroxy-3'-tert-5'-methylphenyl)-5-chlorobenzotriazole

CAS NO:  3896-11-5
Introduction:
UV-326 is a benzotriazole type UV absorber. It has a high absorption in the wavelength
of 290~400nm. It is also efficient for the light stabilization of polyvinyl chloride, unsaturated
polyurethane, polystyrene, polycarbonate, coatings and lacquers.

Specification:
.Appearance: slightly yellowish powder
.Melting Point: 137~142℃
.Content (HPLC) : 99% Min.
.Transmittance: 460nm≥97%   500nm≥98%
.Ash: 0.1% Max.
.Loss on drying: 0.5% Max.

Chemical name: 2-[2'-hydroxy-3',5'-bis(-dimethyl benzyl)-phenyl]benzotriazole
Molecular Formula ： C30H29N3O
CAS NO.:70321-86-7
Application ： UV-234 is a kind of yellowish powder, melting point is 139.5-141 ℃ , it is a fine light stabilizer, suitable for PP, TPE , hard PVC, POM, PA, PC, PBT/PET, PMMA,etc.
Specification ： 
Appearance: light yellow powder 
Melting Point: ≥ 139.5-141 ℃ 
Volatile Matter: ≤ 0.5% 
Ash Content: ≤ 0.05% 
Purity: ≥ 99% 
Transmissirity: 460nm≥ 97 %   500nm≥ 98% 
Packing: 25kg paper drum or carton