Поставка протокатеховой кислоты CAS 99 50 3 промежуточное вещество для окрашивания 3 4 дигидроксибензойной 99% чистоты

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Products Description


Dyestuff Intermediate 3, 4-Dihydroxybenzoic Acid 99% Purity Protocatechuic Acid Powder




Protocatechuic acid is white to slightly brown needle-like crystals with a melting point of about 200 °C (decomposition). Soluble in hot water, ethanol and ether, slightly soluble in cold water, insoluble in benzene. Decomposes in boiling water and releases carbon dioxide. The aqueous solution is green when encountering ferric chloride, and dark red when encountering sodium bicarbonate.


Specification


Product Name
Dyestuff Intermediate 3, 4-Dihydroxybenzoic Acid 99% Purity Protocatechuic Acid
Specification
99%
Appearance
White crystalline powder
Cas
99-50-3
Sample
Avaliable
MOQ
1Kg
Shelf life
2years
Package
1kg Dyestuff Intermediate 3, 4-Dihydroxybenzoic Acid 99% Purity Protocatechuic Acid Powder with double plastic container inside/Aluminum foil bag outside.
1kg/Carton,5kgCarton,10kg/Carton,25kg/Drum, OEM
Shipment
FedEx,DHL,EMS,UPS
Delivery time
Within 2-3 work days after payment
Payment terms
TT,Alibaba Trade Assurance,Western Union


Certificate of Analysis


Product Name
Protocatechuic Acid
Test Items
Specifications
Result
Assay
99.0-100.5%
99.73%
PH
2.5-3.5
2.74
Specific rotation[a]D20
+24.8°-+25.8°
+25.2°
Specific rotation[a]D25
/
Conforms
Transmittance(T430)
≥98.0%
98.43%
Chloride(CI)
≤0.02%
Conforms
Ammonium(NH4)
≤0.02%
Conforms
Sulfate(SO4)
≤0.02%
Conforms
Iron(Fe)
≤10PPM
Conforms
Heavy metals(Pb)
≤10PPM
Conforms
Arsenic
≤1PPM
Conforms
Other amino acids
conform
Conforms
Ninhydrin-positive substances
/
Conforms
Loss on drying
≤0.20%
Absent
Residue on ignition
≤0.10%
Absent
Conclusion
Conform with the specification.
Storage
Store in cool and dry places, keep away from strong light and heat
Shelf Life
36 months under the above condition and in its original package


Application


Application
It usually used in health-care, nutrition supplement, food fields.


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