Ninhydrin GR for analysis (catalogue No. 1067620010) is a chemical reagent used for detection and quantification of amino acids, peptides and proteins by forming coloured compounds with free amino groups. It is supplied as a high-purity solid meeting ACS reagent and European Pharmacopoeia (Ph. Eur.) standards, suitable for analytical and research laboratory applications.
Ninhydrin GR for analysis (catalogue No. 1067620010) is a high-purity organic reagent supplied by MilliporeSigma / Merck, meeting ACS reagent and Ph. Eur. (European Pharmacopoeia) quality standards. Chemically, ninhydrin (2,2-dihydroxy-1,3-indandione) reacts with free amino groups in amino acids, peptides and proteins to produce a deep blue or purple chromophore (Ruhemann’s purple), widely used in analytical procedures for detecting and quantifying amino compounds in biological, environmental and chemical samples.
Advantages
- High analytical quality reagent grade meeting ACS and Ph. Eur. specifications.
- Well-defined reactivity with amino acids and proteins for chromogenic detection.
- Certified purity supports reproducible analytical results.
- Stable solid form suitable for storage and long-term use.
Technical specifications
| Chemical name | Ninhydrin (2,2-dihydroxy-1,3-indandione) |
| CAS number | 485-47-2 |
| Molecular weight | 178.14 g/mol |
| Grade | ACS reagent, Ph. Eur. reagent |
| Form | Solid crystalline powder |
| Appearance | White to off-white to light yellow crystalline powder |
| pH (10 g/L solution) | 4.6–5.0 (20 °C) |
| Melting point | 250–258 °C (decomposition) |
| Bulk density | ≈ 680 kg/m³ |
| Storage conditions | 15–25 °C in a dry, tightly-closed container |
| Brand | Merck |
