Is borosilicate glass made in China safe?

Borosilicate glass is lead and cadmium-free, and it won't leach harmful chemicals into your tea. It's a superior material that is traditionally used for science and laboratory work and is even chemical resistant and strong enough to store nuclear waste.

Test tubes intended for general chemical work are usually made of glass, for its relative resistance to heat. Tubes made from expansion-resistant glasses, mostly borosilicate glass or fused quartz, can withstand high temperatures up to several hundred degrees Celsius.

Glass test tubes are thick walled and heat and/or chemical resistant. They are easier to see through than plastic tubes. Borosilicate glass test tubes can withstand thermal shock and chemical shock which makes them a common test tubes material for chemistry applications.

Manufactured from borosilicate glass with a heavy wall design for strong resistance to heat and chemicals. Fisherbrand™ Borosilicate Glass Heavy Wall Rimless Test Tubes are ideal for chemical and biological work.