USP Standard Retinol Powder Vitamin a with Good Price CAS 68-26-8

Details:

Vitamin A, light yellow flake crystals, melting point 62-64°C, boiling point 120-125°C (0.667Pa). Easily soluble in grease or organic solvents, but insoluble in water. It has good thermal stability, relatively stable under alkaline conditions, and unstable under acidic conditions. It shows a characteristic blue reaction when encountering antimony trichloride, and is easily damaged by ultraviolet rays and oxygen in the air. It can be protected when it coexists with vitamin C.
 

Vitamin A includes A1 and A2, and A1 is retinol. Vitamin A2 is 3-dehydroepianthol, and its physiological activity is 40% of that of vitamin A1.Vitamin A can promote growth and reproduction, maintain the normal secretion of bone, epithelial tissue, vision and mucous epithelium and other physiological functions. Vitamin A and its analogues can prevent precancerous lesions. In the absence of it, growth retardation and dark adaptability decrease, resulting in night blindness. Dry eye disease occurs due to the dryness, desquamation, hyperkeratosis and decreased lacrimal gland secretion of epithelial cells of epidermis and mucosa. The cornea in severe cases is softened, perforated and blind. The epithelial cells of respiratory tract keratinized and lost cilia, which made the resistance reduced and easy to infect. Foods with more vitamin A include liver, egg yolk and milk powder of poultry and livestock. Carotene can be changed into vitamin A in intestinal mucosa, red yellow and dark green vegetables, and fruits contain more carotene.

Hongkong XinRunde Chemical Co., Ltd is a renowned pharmaceutical manufacturer. We can offer high quality products at competitive price in quick delivery with 100% custom pass guaranteed. Never stop striving to offer our best service is our philosophy. We have Flexible and Untraceable payment terms. As a leading manufacture, our products have been exported to Germany, Norway, Poland, Finland, Spain, UK, France, Russia, USA, Brazil, Mexico, Australia, Japan, Korea, Thailand, Indonesia, Uruguay and many other countries.

superiority of choosing our company

1, We guarantee deeply analyze and demonstrate, purity more than 99%
2, Factory outlet with priority price & large stock.
3, Special magic vacuum safe package & safe shipping way.All parcel shipments are shipped discreetly and secure under customers' all requests.
4, We promise reship policies if post failed or refund if you need.
5, Rate of passing customs is 99.9% including Russia,Australia and anyother.
6, TNT & UPS & DHL & EMS & Fedex or special line is available for you.Freight fee is all charge by seller.
7,Payment terms: , Moneygram ,bitcoin ,T/T for your choices.

Our services
1. Customer Satisfaction is our priority and guarantee for the future.
2. We co-develop products and projects with our partners.
3.Place of Origin China with Super quality by reasonable price.
4.When you meet problems in mineral processing, we can provide technical guidance.
5.We will ship the goods that you order from us by EMS, DHL, UPS, or FedEx.We will decided to choose which courier depend on Different countries.To find the best way to delivery the goods for you.
6.We will ship the goods within 5days after get your payments.If you want to cancel or change order, please tell me within 24hours after you finish the payment...So we both can make the best of the bad bargain.
Bulk Order: Shipped via sea or air, it's according to your requirement, delivery time is 7-15days after payment
7.if you have any other questions to consult me.please not hesitate to contact me any times.  

We pride ourself on our excellent team of well-known engineers, technological persons and young professional staffs to research and develop new process. We are also dedicated to provide custom synthesis and contract research services to industrial and academic entities on a short or long-term basis. In our lab and pilot-plant, compounds can be manufactured in the quantity from a few grams up to tens of kilos and beyond. we can supply the key intermediates for your project, which short your synthesis scheme and supply you a reference compound for bioassay or a high purity analytical standard.