Density 1.0± 0.1g /cm3
Boiling point 496.4±24.0 °C at 760 mmHg
Melting point 83-86 °C(lit.)
Molecular formula C27H44O
Molecular weight 384.638
Flash point 214.2±15.1 °C
Precision mass 384.339203
PSA 20.23,000
LogP 9.72
Appearance crystal
Vapor pressure 0.0±2.9 mmHg at 25°C
Refractive index 1.523
Storage condition
3 This product should be sealed in a cool and dry place and kept away from light.
stability
Colorless crystal. Oxidized and deactivated in humid air for a few days, the pure crystals only deteriorated slightly after being stored in brown vacuum ampoules in the refrigerator for one year. Vitamin D3 is generally more stable than vitamin D2. D3 is found in human and most animal tissues and is abundant in foods such as cod liver oil, liver, roe, milk, cream and egg yolks. The human skin contains 7-dehydrocholesterol, the precursor of vitamin D3, which can be converted into D3 by sunlight or ultraviolet irradiation, so more sun exposure can prevent vitamin D deficiency.
A1: We usually quote within 6 hours after we get your inquiry -If you are very urgent to get the price, please email us or contact us in other ways so that we can offer you a quote.
Q2: Can I buy samples placing orders?
A2: Yes.Please feel free to contact us.
Q3: What is your lead time?
A3: It depends on the order quantity and the season you place the order.Usually we can ship within 3-5 days for quantity,and about 15 days for large quantity.
Q4: What is the shipping method?
A4: It could be shipped by sea,by air or by express(EMS,UPS,DHL,TNT,FEDEX and ect).Please confirm with us before placing orders.
Q5: How do you make our business long-term and good relationship?
A5:
1.We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them,no matter where they come from.
