| Active Ingredient: | Riboflavin |
|---|---|
| Storage: | Cool Dry Place |
| Expiry Date: | 2 Years |
| Type of Product: | API, Food Additives and Feed Additives |
| Application: | Raw Material |
| Purity: | 98.0%-102.0% |
| Samples: |
|---|
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Audited Supplier Prodcut Name: Vitamin B2
| Items of Test | Limits of Test | Results of Test |
| 1.Appearance | Orange yellow crystalline powder | Meets |
| 2.Identification | Positive | Meets |
| 3.Acidity or Alkalinity | check the color of the test solution after adding the respective solutions | Meets |
| 4.Absorbance | 0.31-0.33 A373nm/A267nm 0.36-0.39 A444nm/A267nm | 0.32(BP) 0.33(EP) 0.38(BP) 0.38(EP) |
| 5.Lumiflavin | Absorbance of the filtrate at 440nm does not exceed 0.025 (USP) |
0.003(USP) |
| 6.Specific Rotation | between-115º and -135º | -121º(USP) -126º(BP/EP) |
| 7.Particle Size | NLT 95% passes through 80 mesh sieve | Meets |
| 8.Loss on Drying | ≤1.5% | 0.2% |
| 9.Residue on Ignition | ≤0.3% (USP) ≤0.1%(BP/EP) |
0.1% |
| 10.Assay | 98.0%-102.0% (USP) 97.0%-103.0% (BP/EP) |
98.5%(USP) 99.4%(BP/EP) |
| 11.Organic Volatile Impurities |
Method IV <467>(USP) | Meets |
| 12.Heavy Metals | <10ppm | Meets |
| 13.Related Substance | Impurity A: not more than 0.025% Impurity B: not more than 0.2% Impurity C: not more than 0.2% Impurity D: not more than 0.2% Unspecified impurity: not more than 0.1% Total: not more than 0.5% |
0.0026% 0.13% 0 0.06% 0.07%/0.08% 0.34% |
ComWin International Co.,Ltd was founded in 1992. Changzhou ComWin Fine Chemicals Co.,Ltd. as a subsidiary was established in 2003. Its manufacturing site is situated in Huangyan Economic Development Zone, Taizhou with the total area approximately 70,000 and nearly 80 staff.
ComWin is specializing in producing and distributing APIs, Animal healthcare products, Nutritional Ingredients. Our main products are 5-Chloro-2-pentanone, 2-MeTHF, Rosuvastatin Calcium, Fipronil, Cloprostenol Sodium and Noni Juice.
International logistics services is our highlighted strengths, such as cold-chain, hazardous shipment, door to door, which we've been providing to Sanofi, Merial, Vetoquinol, IMCD, Reckitt Benckiser, etc.
Q1:Can i get some samples?
A: Yes, we can supply the free sample, but the shipping cost be paid by our customers.
Q2: Which kind of payment terms do you accept?
A: T/T, LC, D/P and Flexible payment by Credit approved.
Q3:Which transportation do we use?
A:Samples could be DHL, UPS, TNT, EMS, Fedex, and so on. For mass orders, it will be delivered by air or sea.
Q4: How about your delivery time?
Generally, it takes 5 working days after receiving your advance payment.
Q5: How do you treat quality complaint?
A: First of all, our quality control guarantees that quality is accomplished with the confirmed specification, and we take 100% responsibility for our orders.
Q6:How can we trust you?
A: You are always warm welcomed to visit us at any time. Before we start B2B, MIC has audited our company on-spot and approved our credit.
Q7:Do you test all your goods before delivery?
A:Yes, we have 100% test before delivery.
A1 Quality control: We take quality as our life. We strictly control the quality of each process and establish a complete quality control system.
A2 carefully packing: 1kg, 5kg, 15kg, 20kg, 25kg can be packed in different specifications. Packaging can be customized according to customer requirements. Aluminum foil bag and carton. Ensure the safety of transportation. And free samples are available.
A3 Quality service: We have a professional sales DEP. quality DEP. and logistics DEP for quality assurance and service satisfaction.
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