I-Chem®. Manufacturer: I-Chem Company (Aijiren Tech) Family Part #: ICHEM TSI-S-D4. I-Chem® offers both clear and amber borosilicate glass vials available in three sizes with the standard, 0.125 in. thick, I-Chem® blue, PTFE/silicone septa in an open-top 24-414 polypropylene cap. Amber vials should be used for light sensitive samples.