Meta silicate penta hydrate

We ask for meta silicate penta hydrate.

specifications:
appearance white crystalline
sodium oxide (na2o)% 28. 00-30.00
silica (sio2)% 27.00-29.00
water insoluble 0.2% max
iron (fe) 200p.p.m% max
whiteness 90 min
bulk density 0.80-0.97g/cc
ph of 1.0% solution 12-13