Phosphor in the pack has the chemical formula Ca₃(PO₄)₂ which is not any type of phosphor. That chemical formula is the formula for tricalcium diphosphate. And a Phosphor is any material thats luminescent, and Phosphorus is not luminescent.

This has kind of been addressed by GTCE in a fairly recent update, but it seems they renamed one of the items incorrectly.

Fixed by #809

All of the chemistry-related things come from GTCE. Please write a bug ticket for GTCE (please use the bug submission form as the information requested is important) so they are aware of and can track the issue.

I think @DStrand1 is planning to work on another set of chemistry changes in GTCE so it would likely be considered and addressed at that time.

Ok thank you for replying so fast

This compound is not familiar to me, neither the name nor the composition. Is this in 1.2.2 or in a dev snapshot?

I took this screenshot from the latest dev snapshot (e7dfca5)