1. CR81.1 APA OXIGENATA 30% PA, Indigen - 2 l, 2. CR35 ACID FOSFORIC 85% PA, 1 L Indigen, 3. CR52 ACID SULFURIC 96-98% PA, 1 L Indigen 4. CR190 HIDROXID DE SODIU pellets PA, 1 kg Indigen 1 - 2 saptamani 1 22.75 22.75 5. CR188 HIDROXID DE POTASIU PA, 1 kg Indigen 6. P015.1 Ferrous sulphate heptahydrate min. 99 %, p.a., ACS , 500 g 7. 7638.1 Reactiv ROTH Urea min. ≥99.5 %, cryst. , 1 kg ROTH 8. CR267 SULFAT DUBLU DE FIER SI AMONIU (Sare Mohr), 1 kg Indigen 9. P744.1 Potassium dichromate, ≥99,5 %, p.a., ACS, ISO, 500 g 10. T132.1 Ferroin solution 1/40 mol/l (1/40 M) Redox indicator , 100 ml ROTH - 2 buc 11. T112.1 Mercury(II) sulphate, ≥98 %, p.a., ACS, 100 g ROTH - 2 buc 12. CR254 SULFAT DE ARGINT PA, 50 g Indigen - 5 buc 13. KK08.1 Permanganat de potasiu, ≥99 %, p.a., ACS, max. 0,05 ppm Hg, 500 g ROTH 14. CR41 ACID OXALIC PA, 1 kg Indigen 15. 15422749 Alfa Aesar™ 2-Chloro-6-(trichloromethyl)pyridine, 98%, 1G Fisher 16. 11332126 N-Allylthiourea, 98%, 25 g Fisher - 1 buc 17. 3904.2 Potassium dihydrogen phosphate, ≥99 %, p.a., ACS, 250 g ROTH - 2 buc