Optical Brightener OB-1 (CAS 1533-45-5) — formula C28H18N2O2, molecular weight 414.5; category dyes and pigments.
Optical Brightener OB-1 (CAS 1533-45-5) is a dyes and pigments. Its molecular formula C28H18N2O2 comprises 28 C, 18 H, 2 N, 2 O atoms. Its molecular weight is about 414.5. Reported physicochemical data: LogP about 7.2. Dyes and pigments impart color to textiles, plastics, coatings and inks, with attention to fastness, dispersibility and application process. Applied in textile dyeing, plastic coloring, inks and coatings, paper and leather processing. As a sourcing and distribution partner we help locate and compare this item across domestic and cross-border channels, arranging samples and batch orders with full COA and compliance files.
| CAS Number | 1533-45-5 |
|---|---|
| Molecular Formula | C28H18N2O2 |
| Molecular Weight | 414.5 |
| LogP | 7.2 |
| Applications | Antioxidant, Brightener, U.S. Production: 2023: <25, Adhesive Manufacturing, Textiles, apparel |
| Category | Dyes & Pigments |
Documented applications: Antioxidant, Brightener, U.S. Production: 2023: <25, Adhesive Manufacturing, Textiles, apparel.
Optical Brightener OB-1 is a colorant or pigment compound with CAS registry number 1533-45-5 and molecular formula C28H18N2O2 (molecular weight 414.5), belonging to the dyes and pigments segment of chemical raw materials.
CAS number: 1533-45-5
Its molecular formula C28H18N2O2 comprises 28 C, 18 H, 2 N, 2 O atoms.
Also known as: Optical Brightener OB-1 · 荧光增白剂OB-1
Category: dyes and pigments
The CAS registry number of Optical Brightener OB-1 is 1533-45-5.
Molecular formula C28H18N2O2, molecular weight 414.5.
It is also registered under: Optical Brightener OB-1, 荧光增白剂OB-1.
Recorded applications: Antioxidant, Brightener, U.S. Production: 2023: <25, Adhesive Manufacturing, Textiles, apparel.
Category: Dyes & Pigments.
Packaging is agreed per order, from lab-scale packs to bulk, and confirmed with each order rather than fixed on the page. A Certificate of Analysis (COA) ships with every batch and MSDS is available; where the end use carries a regulatory limit (food contact, pharmaceutical or cosmetic), state the standard at enquiry and the grade is set against it.
Independent reference data for Optical Brightener OB-1 (CAS 1533-45-5), compiled from public chemistry databases.
| CAS Registry Number | 1533-45-5 |
|---|---|
| PubChem CID | 73744 |
| Molecular formula | C28H18N2O2 |
| IUPAC name | 2-[4-[2-[4-(1,3-benzoxazol-2-yl)phenyl]ethenyl]phenyl]-1,3-benzoxazole |
| UNII (FDA) | C28H18N2O2 |
| Molecular Weight | 414.5 |
|---|---|
| XLogP3 | 7.2 |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 4 |
| Exact Mass | 414.136827821 |
| Monoisotopic Mass | 414.136827821 |
| Topological Polar Surface Area | 52.1 |
| Heavy Atom Count | 32 |
1533-45-5; 4,4'-Bis(2-benzoxazolyl)stilbene; DTXSID4051744; Benzoxazole, 2,2'-(1,2-ethenediyldi-4,1-phenylene)bis-; RefChem:506551; DTXCID0030299; 1,2-Bis(4-(benzo[d]oxazol-2-yl)phenyl)ethene; C28H18N2O2; Fluorescent brightener OB-1; OPTICAL BRIGHTENER 1; DTXSID10892019; CS-W011665; AC-10112; 4,4'-Bis(1,3-benzoxazol-2-yl)stilbene; 4,4'-BIS(2-BENZOXAZOLYL)STILBENE, TRANS-; Q27251389
| Regulatory & Food Contact | FDA Cumulative Estimated Daily Intake (CEDI): FCS FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS 2,2'-(1,2-ETHENEDIYLDI-4,1-PHENYLENE)BIS(BENZOXAZOLE) 2,2'-(1,2-ETHENEDIYLDI-4,1-PHENYLENE) BIS(BENZOXAZOLE) |
|---|---|
| GHS notification summary | 44.6% (145 / 325) |
| GHS notification summary | 44.6% (145 / 325) |
|---|---|
| Reported hazard statements | H315 (14.2%), H319 (14.2%), H335 (13.2%), H411 (37.2%) |
This chemical does not meet GHS hazard criteria for 44.6% (145 of 325) of reports.
H315 (14.2%): Causes skin irritation [Warning Skin corrosion/irritation]
Optical Brightener OB-1 · CAS 1533-45-5 · C28H18N2O2. UNII C28H18N2O2.
Source: PubChem / Wikidata; the batch COA governs where values differ.
Supplier: Jinan Shenghe Chemical Co., Ltd.
中文页面: 荧光增白剂OB-1