High Quality 99% Purity Vitamin D4 Powder CAS 511-28-4

• CAS No.: 511-28-4
• Formula: C28h46o
• Environmental Protection: Yes
• Certification: REACH
• Color: White
• Classification: Vitamin D4
• Model NO.: V-9
• Function: Ask Me
• Appearance: Powder
• Assay Method: HPLC, UV, Tlc,Gc
• Transport Package: 1kg-25kgs
• Specification: 99%
• Trademark: SunhealthBio
• Origin: China
• HS Code: 0601101000
• Production Capacity: 10t/Year

Product Description

 

Description

 

Derived from cholesterol, vitamin D is biosynthesized from its prohormone cholecalciferol (D3), the product of solar ultraviolet irradiation of 7-dehydrocholesterol in the skin. In 1966, it was first recognized that vitamin D must undergo activation via two oxidative metabolic steps. The first oxidation to 25-hydroxycholecalciferol (25(OH)D3: calcifediol; Calderol) occurs in the endoplasmic reticulum of the liver and is catalyzed by vitamin D 25-hydroxylase. This activation step is not regulated by plasma calcium concentrations. The major circulating form (10-80 μg/mL) is 25(OH)D3, which also is the primary storage form of vitamin D.
 

 

 

 

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FAQ

Q1. What's your payment terms?
T/T  L/C  Paypal  Western Union.

Q2. What's your delivery time?
Usually we will arrange the shipment in 7 -15 days,due to different products you choose.

Q3. How about the packing?
Usually we provide the packing as 25 kg / bag or carton,and also as your request bag.

Q4. How about the validity of the products?
According to the products you ordered.

Q5. What documents you provide?
Usually, we provide Commerical Invoice, Packing List, Bill of loading, COA ,Origin certificate. 

If your markets have any special requirements, let us know.

Q6. What is loading port?
Usually is Shanghai,Beijing or Shenzhen.

Q7:Can we have samples for development?
We can provide free samples (small quantity) to you, but the freight cost on buyer's account.
Q8: Can you do customized?
We can make the products as per customers' requested products and quantity