Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2,2'-thiophene-2,5-diylbis(benzoxazole)
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

2866-43-5

2866-43-5 structure

Name: 2,2'-thiophene-2,5-diylbis(benzoxazole)
Chemical Name: Fluorescent Brightener 185
CAS Number: 2866-43-5
Molecular Formula: C₁₈H₁₀N₂O₂S
Molecular Weight: 318.34900
Catalog: Catalysts and additives Fluorescent whitening agent
Create Date: 2018-07-23 01:19:08
Modify Date: 2026-07-01 12:42:32

Name	Fluorescent Brightener 185
Synonyms	1-Propanol,2,2'-thiobis sof (fluorescent brightener) 2,5-BIS(2-BENZOXAZOL-2-YL)THIOPHENE 2,2'-sulfanediyldipropan-1-ol 2,2'-(2,5-thiophenediyl)bis-benzoxazole Benzoxazole, 2,2-(2,5-thiophenediyl)bis fluorescent brightener 2-[5-(1,3-benzoxazol-2-yl)-2-thienyl]-1,3-benzoxazole 2,5-Bis(2-benzoxazolyl)thiophene FLUORESCENT BRIGHTENER 185 :2,2''-(2,5-THIOPHENEDIYL)BIS-BENZOXAZOLE 2,2'-thiophene-2,5-diyl-bis-benzooxazole 2,2'-thiodipropanol 2,5-Bis(benzoxazol-2-yl)thiophene 2,2'-sulfanediyl-bis-propan-1-ol Fluorescent Brightener 185 ISO 9001：2015 REACH FBA185 C.I. Fluorescent Brightener (12-8) fluorescent brightener 2,4-DICHLORO-5-FLUORO-3-NITROBENZOTRIFLUORIDE 2,5-di(benzoxazol-2-yl)thiophene 2,5-di(benzoxazol-2-yl)-thiophen 2-[5-(1,3-benzoxazol-2-yl)thiophen-2-yl]-1,3-benzoxazole c.i 2,2'-(2,5-thiophenediyl)bis-benzoxazol

Density	1.385
Boiling Point	466.4ºC at 760 mmHg
Melting Point	216-220ºC
Molecular Formula	C₁₈H₁₀N₂O₂S
Molecular Weight	318.34900
Flash Point	235.9ºC
Exact Mass	318.04600
PSA	80.30000
LogP	5.36450
Index of Refraction	1.6000 (estimate)

CHEMICAL IDENTIFICATION

RTECS NUMBER :: DM4888166

CHEMICAL NAME :: Benzoxazole, 2,2'-(2,5-thiophenediyl)bis-

CAS REGISTRY NUMBER :: 2866-43-5

LAST UPDATED :: 199701

DATA ITEMS CITED :: 2

MOLECULAR FORMULA :: C18-H10-N2-O2-S

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: >30 gm/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: MVCRB3 MVC-Report. (Stockholm, Sweden) No.1-2, 1972-73. Discontinued. Volume(issue)/page/year: 2,193,1973

HS Code	2934999090

4282-31-9

95-55-6

~5%

2866-43-5

Literature: MASSACHUSETTS INSTITUTE OF TECHNOLOGY; PRESIDENT AND FELLOWS OF HARVARD COLLEGE; GENZYME CORPORATION Patent: WO2009/137081 A2, 2009 ; Location in patent: Page/Page column 44-45 ; WO 2009/137081 A2

273-53-0

625-88-7

~90%

2866-43-5

Literature: Shibahara, Fumitoshi; Yamaguchi, Eiji; Murai, Toshiaki Chemical Communications, 2010 , vol. 46, # 14 p. 2471 - 2473

273-53-0

3141-27-3

~50%

934329-17-6

2866-43-5

Literature: Derridj, Fazia; Djebbar, Safia; Benali-Baitich, Ouassini; Doucet, Henri Journal of Organometallic Chemistry, 2008 , vol. 693, # 1 p. 135 - 144

273-53-0

3141-27-3

~49%

2866-43-5

Literature: Derridj, Fazia; Gottumukkala, Aditya L.; Djebbar, Safia; Doucet, Henri European Journal of Inorganic Chemistry, 2008 , # 16 p. 2550 - 2559

4282-31-9

2866-43-5

Literature: Seha, Zdenek; Weis, Claus D Helvetica Chimica Acta, 1980 , vol. 63, # 2 p. 413 - 419

3857-36-1

2866-43-5

Literature: Seha, Zdenek; Weis, Claus D Helvetica Chimica Acta, 1980 , vol. 63, # 2 p. 413 - 419

Precursor 6
4282-31-9 95-55-6 273-53-0 625-88-7
3141-27-3 3857-36-1
DownStream 0

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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