Sertificate

Product	Grade
Ammonium solution, NH₄OH	high pure "25-5" \| for chemical analysis
Hydrochloric acid, HCL	high pure. "26-4" \| high pure "20-4" \| high pure "7-4" \| for chemical analysis
Sulfuric acid, H₂SO₄	high pure "25-5" \| high pure "18-4" \| high pure "11-5" \| for chemical analysis
Sulfuric acid fuming, SO₃	pure
Accumulator sulfuric acid, H₂SO₄	high pure
Ammonium fluoride, NH₄F	high pure "5-4"
Hydrofluoric acid, HF	high pure "27-5"

"Sigma Tec", Vashutinskoye sh.1, bld.6, Khimki, Msk. region 141400, Russia. Tel./fax (495) 571-74-69, 545-28-09, 545-28-06,
E-mail: sigma-tec@rambler.ru, ptp@sigmatec.ru, ira@sigmatec.ru, igor@sigmatec.ru

Ammonium solution, NH4OH