Methyl-beta-cyclodextrin (DS~12) primary standard

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Price: € 150.00 / g

Abbreviation: RAMEB PS

CAS Number: 128446-36-6

Product Number:

Cyclodextrin type: Randomly substituted cyclodextrins, neutral

Quality: analytical standard

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Chemical and Physical Description

Average Molecular Formula	C₄₂H_70-nO₃₅· (CH₃)_n
Average Formula Weight	1135 + n·(14.0)
Possible impurities	Beta-cyclodextrin
Solubility (in 100 cm³solvent, at 25 °C)	Water: > 50 g Methanol: > 50 g Chloroform: ~ 2 g

Specification

Test	Method	Range
Appearance	Visual	white or almost white powder
Identification A	IR (USP <197>, EP 2.2.24)	conform with theoretical structure
Identification B	NMR (EP 2.2.33)	conform with theoretical structure
Clarity of solution (10%, w/v)	Visual	the solution is clear, and essentially free from particles of foreign matter
Conductivity (25 °C, 1% solution in water)	EP 2.2.38	max. 200 µS/cm
Residue on ignition	USP	max 0.5%
Average Degree of Substitution (n)	NMR (EP 2.2.33)	Molar substitution: 0.4 - 1.5
Light adsorbing impurities	UV-VIS (EP 2.2.25)	A230-350 nm < 0.10 A350-720 nm < 0.05
Heavy metals	USP <231>	Cadmium NMT 0.5 µg/g Lead NMT 0.5 µg/g Arsenic NMT 1.5 µg/g Mercury NMT 3.0 µg/
Related substances: residual BCD	HPLC	max. 0.1%
Loss on drying	halogen dryer	max. 5.0%
Purity	calculated	> 95%