pharmaceutical ingredients Oxytocin Acetate peptide power cheap price CAS NO.50-56-6

appearance

white or almost white , hygroscopic powder

conforms

solubility

very soluble in water. it dissolves in dilute solutions of acetic acid and of ethanol (96 per cent).

conforms

hplc

the principal peak in the chromatogram obtained with the test solution is similar in retention time to principal peak in the chromatogram obtained with the reference solution.

conforms

amino acid analysis

no more than the traces of the other amino acids are present.

no more than the traces of the other amino acids are present.

ph

3.0-6.0 (200mg ot in 10ml of co2 free water)

4.6

related substances

unspecified impurity

for each impurity: nmt1.0%

0.26%(single largest impurity)

purity(hplc)

nlt 98%

99.25%

ms

1007.2±1.0

conforms

acetic acid

6.0~10.0%

8.2%

water content(karl fischer）

nmt 5.0%

4.1%

assay(by hplc)

93.0~102.0%

98.7%

biological activity

（calculated on the basis of 1mg of oxytocin peptide being equivalent to 600iu of biological activity）

with reference to anhydrous and acetic acid free substance

as is reference

519iu/mg

522iu/mg

specific optical rotation

-19.5 to -23.5

(c=0.5%; 1% acetic acid)

-20.12°

residual solvent

methanol

acetonitrile

triethylamine

nmt 3000ppm

nmt 410 ppm

nmt 320 ppm

conforms