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: 2H-pyran-2-one
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

504-31-4

504-31-4 structure

504-31-4 structure

Name: alpha-pyrone
Chemical Name: 2H-pyran-2-one
CAS Number: 504-31-4
Molecular Formula: C₅H₄O₂
Molecular Weight: 96.08410
Catalog: Pharmaceutical intermediate Heterocyclic compound Pyran compound
Create Date: 2018-09-04 17:52:13
Modify Date: 2026-07-01 10:45:45

Name	2H-pyran-2-one
Synonyms	chloro-4’phenyl 2h-pyran-2-one,tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-,(3-alpha,4-be EINECS 207-990-5 Coumalin 2,4-Pentadienoic acid, 5-hydroxy-, delta-lactone α-Pyron MFCD00006639 α-Pyrone 2-Pyranone pyran-2-one ALPHA-PYRONE 2-Pyrone 2H-Pyran-2-one 2H-Pyran-2-one, R 4-beta,6-alpha)-tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-2h-(3-alph cumalin tetrahydro-4-(4-chlorophenyl)-6-methyl-3-phenyl-,(3-alpha,4-beta,6-alpha)-2h-pyran-2-on chloro-4’phenyl-4methyl-6phenyl-3tetrahdyro-3,4,5,6pyrone-6(3r,4s,6r Pyrone,alpha ALPHA-PYRONE ISO 9001：2015 REACH Pyrone 2H-Pyran, 2-oxo α-Pyrone>

Density	1.192g/cm3
Boiling Point	102-103ºC20 mm Hg(lit.)
Melting Point	41860ºC
Molecular Formula	C₅H₄O₂
Molecular Weight	96.08410
Flash Point	89.2ºC
Exact Mass	96.02110
PSA	30.21000
LogP	0.63980
Index of Refraction	n20/D 1.53(lit.)
Storage condition	Refrigerator (+4°C)

Safety Phrases	23-24/25
WGK Germany	3
HS Code	2932999099

Precursor 7
123-75-1 7298-67-1 500-05-0 110-87-2
19978-32-6 64919-86-4 70411-95-9
DownStream 10
19978-33-7 22980-23-0 39763-18-3 19978-32-6
833-50-1 131-11-3 1877-72-1 121-69-7
121-91-5 31678-73-6

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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