Lactose DC Lactose Monohydrate DC

• Grade Standard: Medicine Grade
• Type: Chemical Reagent
• State: Solid
• Volatile: Not Volatile
• Standard: Ep
• Shelf Life: 24 Months
• Model NO.: SAMREAL-0846
• Appearance: White Crystalline Powder
• Assay: 98%~102%
• Transport Package: Bag
• Specification: 25kg/bag
• Trademark: samreal
• Origin: China

Product Description

Product Name:Lactose monohydrate DC
The detailed specifications are as below:

Items	Standard
Appearance	White or almost white, crystalline powder.
Solubility	Freely but lowly soluble in water, practically insoluble in ethanol (96 per cent).
Identification A	The infrared absorption spectrum of the sample is concordant with that of the standard.
Identification B	The principal spot obtained from the Test solution corresponds in appearance and RF value to that obtained from Standard solution A. The test is not valid unless the chromatogram obtained with Standard solution B shows four clearly discernible spots, disregarding any spots at the origin.
Residue on ignition	NMT 0.1%
Heavy metals	NMT 5µg per g.
Clarity and color of solution	The solution(1g in 10ml of boiling water) isclear and nearly colorless. Determine the absorbance of this solution at a wavelength of 400 nm. The absorbance divided by the path length, in cm, is NMT 0.04
Optical rotation	+54.4°~+55.9°, calculate on the anhydrous basis, determined at 20°
Acidity or alkalinity	Add 0.3ml of phenolphthalein TS: the solution is colorless, and not more than 0.4 ml of  0.1 N sodium hydroxide is required to produce a pink ro red color.
Loss on drying	Dry a sample at 80°for 2 h. NMT 0.5%
Water	4.5%~5.5%
Protein and light-absorbing impurities	210-220 nm: NMT 0.25 270-300 nm: NMT 0.07
TAMC(cfu/g)	<100
Molds and Yeasts(cfu/g)	<50
Escherichia coli. (/10g)	absence
Assaying	This product is 4-O-β-D- pyran galactosyl -D- glucose monohydrate.The content of C12 H22 O11 should be 98.0% ~ 102.0%.
Acidity	Take 1.0g of this product, and the pH value should be 4.0-7.0

Boundary particle size    Over 60 mesh > 80% , Over 120 mesh < 40%.(Single sieve method)

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NINGBO SAMREAL CHEMICAL CO.,LTD.authorized by China Foreign Trade & Economic Bureau, is a comprehensive chemical enterprise intergrating technological development,production, sales and service into a whole. We have close cooperating relationship with many stable good manufacturers, which gives us the advantage to provide our customers with qualified products and good services.
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