Quotations are hereby invited for the following: Supply and delivery of lab chemicals. Specification: 1. (+) Catechin pure standard 5g; 2. (-) Epicatechin pure standard 5g; 3. Gallic acid (trihydroxybenzoic acid) 500g; 4. p-Coumaric pure standard 5g; 5. Caffeic acid pure standard 5g; 6. Quercetin 5g; 7. Kaempferol 5g 8. B-carotene 20g 9. Acetone 2.5L; 10. Ethanol 2.5L; 11. Methanol 2.5L; 12. Aluminium chloride 500g; 13. Sodium Nitrates (NaNO2) 500g; 14. Phenol 500g; 15. Folin-Ciocalteu reagent (2n) 500g; 16. Potassium sorbate 25 kg Food grade; 17. Sodium benzoate 25 kg food grade; 18. Conductivity Standard Solution 12.88; 19. Conductivity Standard Solution 1413; 20. pH buffer (ph7)500 ml; 21. ph buffer (ph 4)500 ml; 22. pH buffer (ph 10) 500 ml; 23. Sodium Carbonate 500g; 24. Sodium Hydroxide Pellets 500g; 25. 2,2,4 - Trimethylpentane - Isooctane 2.5L; 26. 2,2 - diphenyl-1-picrylhydazyl (DPPH); 27. Sodium Hydroxide 1L. Delivery Address: Institute for Tropical and Subtropical Crops, ARC-ITSC, Conner of Bosch Street and Kanyamazane Road R2296, Mbombela. (Тендер №97942527ru)