Dear Khattab the attached manual may be of your interest. I think the possibility of decomposition into HCl is out of question.

Thanks

Do not think that this can be generalized. Likely, you need special purity.

The chlorinated solvents that are supplied have stabilizer like amylene which may interfere with your compound peaks in UV-vis. Make sure you order ultra-pure chlorinated solvent without stabilizer.

Good luck.

if without stabilizer, for example chloroform degrades into HCl.