Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Palmitic acid
Price: Check
Purity: 98.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2-OXO-2H-PYRAN-3-CARBOXYLIC ACID
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

3040-20-8

3040-20-8 structure

3040-20-8 structure

Name: 2-OXO-2H-PYRAN-3-CARBOXYLIC ACID
Chemical Name: 2-oxopyran-3-carboxylic acid
CAS Number: 3040-20-8
Molecular Formula: C₆H₄O₄
Molecular Weight: 140.09400
Create Date: 2017-04-26 02:16:57
Modify Date: 2025-09-21 19:12:10

Name	2-oxopyran-3-carboxylic acid
Synonyms	3-Carboxy-2H-pyran-2-one 2-pyrone-3-carboxylic acid 2-oxo-2H-pyran-3-carboxylic acid

Molecular Formula	C₆H₄O₄
Molecular Weight	140.09400
Exact Mass	140.01100
PSA	67.51000
LogP	0.33800

HS Code	2932209090

25991-27-9 structure

25991-27-9

~78%

3040-20-8 structure

3040-20-8

Literature: Posner, Gary H.; Cho, Cheon-Gyu; Anjeh, Tizah E. N.; Johnson, Neil; Horst, Ronald L.; et al. Journal of Organic Chemistry, 1995 , vol. 60, # 14 p. 4617 - 4628

Precursor 1
25991-27-9
DownStream 2
19978-32-6 18398-80-6

HS Code	2932209090
Summary	2932209090. other lactones. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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