China Fluorescent Brightener Ob-1 CAS: 1533-45-5 Organic Synthesis Intermediate

OB-1 (CAS: 1533-45-5) is a widely used fluorescent Brightener (Optical Brightener), with the full chemical name of 2,2′-(4,4′ -distyrene) bisbenzooxazole, which is a representative product of oxazole brighteners. Its core function is to absorb ultraviolet rays and convert them into blue fluorescence to make up for the yellow phase defect of the material itself, thereby achieving the effect of “whitening and brightening”. It is particularly prominent in the application of polymer materials and textile fields.

CAS: 1533-45-5

Synonyms: 4,4'-BIS(2-BENZOXAZOLYL)STILBENE;2,2'-(1,2-ETHENEDIYLDI-4,1-PHENYLENE)BISBENZOXAZOLE;2,2'-(vinylenedi-p-phenylene)bisbenzoxazole;2,2’-(1,2-ethenediyldi-4,1-phenylene)bis-benzoxazol;OB-C;FluorescentBrightenerOB-1C.I.393;1,2-Bis(4-(benzo[d]oxazol-2-yl)phenyl)ethene;pticalBrighteningAgentOB-1

Molecular Formula: C28H18N2O2

Appearance: Yellow-green Powder

EINECS: 216-245-3

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Brightening Agent OB-1 can absorb invisible ultraviolet light (wavelength range is about 360-380nm) and convert it into blue light or purple visible light with a longer wavelength, so it can compensate for the unwanted yellowish color in the matrix, and reflect more visible light with a wavelength of 400-600nm than the original incident light, so that the products appear whiter, brighter and more bright.
It is a high-efficiency fluorescent whitening agent for polyester fiber, and is widely used in ABS, PS, hips, PC, PP, PE, EVA and rigid PVC. It has excellent whitening effect, excellent thermal stability, and few additives.

Product Name:	2,2′-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole/ OB-1	Batch No.	JL20220322
Cas	1533-45-5	MF Date	Mar, 22, 2022
Packing	25KGS/DRUM	Analysis Date	Mar, 22, 2022
Quantity	1MT	Expiry Date	Mar, 21, 2024
ITEM	STANDARD		RESULT
Appearance	Yellow-green Powder		Conform
Purity	≥ 98.5%		99.1%
Melting Point	352~358℃		356℃
Fineness	Pass 200 mesh		Conform
Ash Content	≤ 0.3%		0.21%
Volatile Matter	≤ 0.5%		0.30%
Conclusion	Qualified

1.OB-1 is a new variety developed abroad, which is suitable for whitening and brightening of PE, PVC, ABS, PC and other plastics. Low dosage, strong adaptability and good dispersion.
2.It can be added during post-processing or polymerization. The whitened product has high whiteness and excellent heat resistance and weather resistance.
3.OB-1 can also be made into paste for textile whitening.

25kgs drum or requirement of clients. Keep it away from light at a temperature below 25℃.

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2019 New Style Wholesale Whitening Agent PVC and Fluorescent Whitening Agent EVA, We offer OEM services and replacement parts to meet the varying needs of our customers. We offer competitive price for quality products and we will make certain your shipment is handled quickly by our logistics department. We sincerely hope to have the opportunity to meet with you and see how we can help you further your own business.