Shanghai Chunyuan Phytochemistry Co., Ltd

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1. 2,3,4,4'-Tetrahydroxybenzophenone

Synonyms: 4-(4-Hydroxybenzoyl)-1,2,3-trihydroxybenzene; 4-(4-Hydroxybenzoyl) pyrogallol
CAS No.: 31127-54-5
Molecular Weight: 246.219
Molecular Formula: C13H10O5

Specification
Item Standard
Appearance: Yellow powder;
Melt point: ...

2. 3, 4-Ethylenedioxythiophene

Molecular Formula: C6H6O2S
CAS: 126213-50-1

Main specification:
Appearance: Colorless or light yellow liquid
Boiling point: 140-144 Centigrade
Moisture: Not more than 0.2%
Content: More than 99%

Application: Monomer for the production ...

3. Propyl gallate

Chemical name: Propyl-3,4,5-Trihydroxybenzoate
Mol. Form and Mol. Wt.: C10H12O5=212.21
CAS 121-79-9

Decription: A white to creamy-white crystalline powder; soluble in 1000 psrts of water, in 3 parts of ethanol, in 3 parts ether, and in ...

4. Ellagic acid

Registry number 476-66-4

1.Specifications:
Item: Standard
Appearance: Brownish or greyest powder
Ellagic acid content %: ≥90
Loss on drying %: ≤5
Ash content % ≤4:
Heavy metal (Pb）ppm: ≤10
Total bacterial count fu/g: ≤10 ...

5. 2,3,4-trihydroxy benzaldehyde

Molecular formula: C7H6O4
Molecular weight: 154.12
Registry number: 2144-08-3

Main specification:
Appearance: Yellowish crystalline power
Assay(HPLC): 99.5%Min
Melting point: 159162℃
Moisture: 0.5%Max
Sulphated ash: 0.1%Max
Clarity ...

6. 2,3,4-Trimethoxybenzaldehyde

Molecular Formula: C10H12O4
Formula Weight: 196.20
Registry number: 2103-57-3

Main specifications:
Item：First-grade product
Appearance：Light yellow flakes or crystalline powder
Loss of drying, %：1
Content，%：99

Application: ...

7. 2,3,4-trihydroxybenzophenone

2,3,4-trihydroxybenzophenone
Synonyms: 4-benzoyl-1,2,3-trihydroxybenzene; 4-benzoylpyrogllol; 2,3,4-THBP

Application: ultraviolet light absorber. Intermediate of ultraviolet positive photoresist in IC industry and cosmetic.
Molecular Formula: ...

8. tannic acid

Molecular formula and weight: C76H52O46=1701.18
Registry number: 1401-55-4

We have the tannic acid products of four specifications as following:
(1)Tannic acid for medicine: Conforming USA Pharmacopoeia of 1990 edition.

Property: Light ...

9. Pyrogallol acid

Synonym: pyrogallic acid
Chemical name: 1,2,3-trihydroxybenzene
Molecular formula and weight: C6H6O3=126.11
Description: White lustrous crystalline powder, soluble in 2 parts of water, 1 part of ethanol and 2 parts of ethyl ether.
Specification: ...

10. 1,2,3-trimethoxy benzene

Molecular formula and weight: C9H12O3 =168.19
Registry number: 634-36-6

Main specifications:
Melting point℃：158～162
Content(dry weight), %≥：98.0
Water,%≤：10.0

Application: Mainly used as pharmaceutical intermediates of ...