Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 4H-1-Benzopyran-4-one,2-(3,4-dimethoxyphenyl)-3-hydroxy-5,7-dimethoxy-
Price: Check
Purity: 97.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 4H-1-Benzopyran-4-one,2-(3,4-dimethoxyphenyl)-3-hydroxy-5,7-dimethoxy-
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

Shanghai Amole Biotechnology Co., Ltd.
China
Product Name: 4H-1-Benzopyran-4-one,2-(3,4-dimethoxyphenyl)-3-hydroxy-5,7-dimethoxy-
Price: ￥Inquiry/100mg ￥Inquiry/1g ￥Inquiry/250mg
Purity: 97.0%
Stocking Period: Inquiry
Contact: Xiyao Wang
Email: 3623107365@qq.com

1244-78-6

1244-78-6 structure

1244-78-6 structure

Name: 4H-1-Benzopyran-4-one,2-(3,4-dimethoxyphenyl)-3-hydroxy-5,7-dimethoxy-
Chemical Name: quercetin 5,7,3',4'-tetramethyl ether
CAS Number: 1244-78-6
Molecular Formula: C₁₉H₁₈O₇
Molecular Weight: 358.34200
Create Date: 2017-03-17 03:25:02
Modify Date: 2025-08-27 17:36:43

Name	quercetin 5,7,3',4'-tetramethyl ether
Synonyms	2-(3,4-dimethoxyphenyl)-3-hydroxy-5,7-dimethoxychromen-4-one 3-hydroxy-3',4',5,7-tetramethoxyflavone 5,7,3',4'-tetra-O-methylquercetin

Density	1.325g/cm3
Boiling Point	550.9ºC at 760mmHg
Melting Point	195.6 °C
Molecular Formula	C₁₉H₁₈O₇
Molecular Weight	358.34200
Flash Point	198.3ºC
Exact Mass	358.10500
PSA	87.36000
LogP	3.20000
Vapour Pressure	5.7E-13mmHg at 25°C
Index of Refraction	1.6

Hazard Codes	Xn
HS Code	2914509090

Precursor 10
58528-03-3 855-97-0 1247-97-8 10496-67-0
76650-20-9 29080-58-8 120-14-9 832-58-6
186581-53-3 6743-92-6
DownStream 6
117-39-5 2150-41-6 51116-92-8 1245-15-4
1247-97-8 7380-44-1

HS Code	2914509090
Summary	HS:2914509090 other ketones with other oxygen function VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:5.5% General tariff:30.0%

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