Mechlorethamine Hydrochloride
192.51Ethanamine, 2-chloro-N-(2-chloroethyl)-N-methyl-, hydrochloride.
2,2¢-Dichloro-N-methyldiethylamine hydrochloride
[55-86-7].» Mechlorethamine Hydrochloride contains not less than 97.5 percent and not more than 100.5 percent of C5H11Cl2N·HCl, calculated on the anhydrous basis.
Packaging and storage—
Preserve in tight, light-resistant containers.
Labeling—
The label bears a warning that great care should be taken to prevent inhaling particles of Mechlorethamine Hydrochloride and exposing the skin to it.
Identification—
B:
Transfer 100 mg to a test tube containing 1 mL of sodium thiosulfate solution (prepared by dissolving 1 g of sodium thiosulfate and 100 mg of sodium carbonate in 40 mL of water), shake, allow to stand for 2 hours, then add 1 drop of iodine TS: the color of free iodine remains.
and 111
pH 
791
:
between 3.0 and 5.0, in a solution (1 in 500).
791:
between 3.0 and 5.0, in a solution (1 in 500).
Water, Method I 921:
not more than 0.4%.
921:
not more than 0.4%.
Ionic chloride content—
Dissolve about 30 mg, accurately weighed, in 30 mL of water contained in a beaker. Add 5 mL of nitric acid and stir. Titrate with 0.02 N silver nitrate VS to a potentiometric endpoint, using a silver combination electrode. Perform a blank determination (see Titrimetry 541), and make any necessary correction. Each mL of 0.02 N silver nitrate is equivalent to 0.709 mg of ionic chloride: not less than 18.0% and not more than 19.3% of ionic chloride is found.
541), and make any necessary correction. Each mL of 0.02 N silver nitrate is equivalent to 0.709 mg of ionic chloride: not less than 18.0% and not more than 19.3% of ionic chloride is found.
Assay—
Transfer about 100 mg of Mechlorethamine Hydrochloride, accurately weighed, to a 125-mL conical flask. Add 100 mg of sodium bicarbonate and 20.0 mL of 0.1 N sodium thiosulfate VS. Allow to stand for 2½ hours, add 3 mL of starch TS, and titrate the excess sodium thiosulfate with 0.1 N iodine VS. Each mL of 0.1 N sodium thiosulfate is equivalent to 9.626 mg of C5H11Cl2N·HCl.
Auxiliary Information—
Please check for your question in the FAQs before contacting USP.
| Topic/Question | Contact | Expert Committee |
| Monograph | Feiwen Mao, M.S.
Scientist 1-301-816-8320 |
(MDOOD05) Monograph Development-Ophthalmics Oncologics and Dermatologicals |
| Reference Standards | Lili Wang, Technical Services Scientist 1-301-816-8129 RSTech@usp.org |
USP32–NF27 Page 2857
Pharmacopeial Forum: Volume No. 29(3) Page 636