Shanghai Nianxing Industrial Co., Ltd
China
Product Name: (±)-[5]helicene
Price: Check
Purity: 95.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: (4-TRIFLUOROMETHYL-PYRIDIN-3-YL)-METHANOL
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

188-52-3

188-52-3 structure

188-52-3 structure

Name: (±)-[5]helicene
Chemical Name: pentahelicene
CAS Number: 188-52-3
Molecular Formula: C₂₂H₁₄
Molecular Weight: 278.347
Create Date: 2018-08-28 10:17:06
Modify Date: 2025-08-21 11:19:45

Name	pentahelicene
Synonyms	[5]Helicene 3,4:5,6-Dibenzophenanthrene Naphtho[2,1-c]phenanthrene Dibenzo[c,g]phenanthrene Dibenzo(c,g)phenanthrene Pentahelicene Dibenzo[c,g]phenanthrene,(A'A A'A currency) (A'A A'A currency)-Pentahelicene

Density	1.2±0.1 g/cm3
Boiling Point	524.7±17.0 °C at 760 mmHg
Molecular Formula	C₂₂H₁₄
Molecular Weight	278.347
Flash Point	264.5±15.1 °C
Exact Mass	278.109558
LogP	7.14
Vapour Pressure	0.0±0.7 mmHg at 25°C
Index of Refraction	1.812

HS Code	2902909090

Precursor 9
457885-21-1 82817-99-0 827346-97-4 54130-90-4
2633-08-1 139371-82-7 139371-86-1 796843-13-5
2586-62-1
DownStream 1
191-24-2

HS Code	2902909090
Summary	2902909090 other aromatic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%

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