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Potassium dihydrogen phosphate is used as a food additive, fertilizer (NPK), paint additive, coating additive, adhesive, buffering agent and in optical modulators. It is extensively used in research and analytical laboratories as a buffer in mobile/sample preparations for analysis by high pressure liquid chromatography (HPLC) and also in organic synthesis. MKP, monopotassium phosphate, owing to its non-linear optical properties, is used in optical modulators and for second-harmonic generation (SHG).
Bhagavannarayana, G.; Rajesh, P.; Ramasamy, P. Interesting Growth Features in Potassium Dihydrogen Phosphate: Unravelling the Origin and Dynamics of Point Defects in Single Crystals. J. Appl. Cryst. 2010, 43, 1372-1376.
Han, W.; Xiang, Y.; Li, F.; Wang, F.; Zhou, L.; Zhao, J.; Feng, B.; Zheng, K.; Zhu, Q.; Wei, X.; Zheng, W.; Gong, M. Evaluating the safe limit of large-aperture potassium dihydrogen phosphate crystals associated with transverse stimulated Raman scattering. Appl. Opt. 2015, 54 (13), 4167-4171.
Hazard Statements: H313-H315-H319
May be harmful in contact with skin. Causes skin irritation. Causes serious eye irritation.
Precautionary Statements: P280a-P305+P351+P338-P312a-P321-P332+P313-P337+P313
Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Call a POISON CENTER/doctor if you feel unwell. Specific treatment (see label). If skin irritation occurs: Get medical advice/attention. If eye irritation persists: