• Sourcing Solutions
  • Services & Membership
  • Help & Community

Quick Details

  • CAS No.: 83-88-5
  • Other Names: Riboflavin
  • MF: Vitamin B2
  • EINECS No.: Vitamin B2
  • Place of Origin: Hubei, China (Mainland)
  • Type: Vitamins, Amino Acids and Coenzymes
  • Grade Standard: Feed Grade, Food Grade, Medicine Grade
  • Brand Name: synchem Vitamin B2
  • Model Number: Vitamin B2 BP/USP
  • Purity: Vitamin B2 pure
  • Appearance: Yellow or orange crystalline powder
  • Identification: Positive
  • Acidity or alkalinity: Check the color of the test solution after adding the respective
  • Lumiflavine: Conforms
  • Light absorption: At 373nm/267nm:0.31-0.33
  • Particle size: 100% pass through 80 mesh sieve
  • Specific rotation: -115°--135°
  • Loss on drying: 1.5% max
  • Heavy metals: 10ppm max
  • Content(on dried basis): 98.0-101.0%

Packaging & Delivery

Packaging Details Vitamin B2 Package:25kg net per carton box/drum, or meets customers demands
Delivery Time one week to one month

Vitamin B6 (HCL)

Synchem International Co.,Ltd as the biggest manufacturer and exporter of Vitamins in China , our group is producing the following Vitamins many chemicals/intermediates from basic chemicals ,and most of these are for US market and Europe , and quality was approved since 1995 . Now we are the No1 manufacturer and exporter of all grade Vitamins in China:


Product Description


Vitamin B2



Appearance:              Yellow or orange small granular

Identification:              Positive

Acidity or alkalinity:   Check the color of the test solution after adding the respective


Lumiflavine:               Conforms

Light absorption:       At 373 nm/ 267 nm: 0.31-0.33

At 444 nm/ 267 nm:  0.36-0.39

Particle size:             100% pass through 100mesh sieve

Specific rotation:      -115° ---  -135°

Loss on drying:          ≤1.5%.

Heavy metals:           <10ppm.

Residue on ignition:   ≤0.1%

Content (on dried basis): 98.0---101.0%


Packing: 25kg net per carton box/drum


Packaging & Shipping

Scientific logistics guarantee the transport safely and low cost


Our Warehouse:

Modern warehouse management 


Company Information

 Own Lab:

Use Advanced equipment to control the quality strict

Global Exhibition: 

Our customer




Trading Process


Synchem International-Your Reliable Partner

1. We have the best knowledge because we have over 15 years experiences in Vitamins, Biocides & Specialities,all intermediats for Pharma and Argochemcial industry fields. 

2. We can get full support from our suppliers in China on price and suppliability. 

3. We can give financial support to you. 

4. We have professional logistics and warehouse at many ports.


Related Products









Transaction History of the Supplier

Below is the information about the supplier's transactions conducted via Alibaba.com. If you require further details regarding the transaction data, please contact the supplier directly.

Transaction Overview


Transaction Details

This supplier has completedtransactions with buyers from .

Shipping Destination
Transaction Value
Transaction Date
Email to this supplier
China (Mainland) | Trading Company
Supplier Assessments:
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $30,000
Learn More