Phosphomolybdic acid solution is primarily used in spectrophotometric determination of phosphate ions. PMA is also component in the 3-color histology stain called Masson’s trichrome; employed in the differentiation step, Phosphomolybdic acid is one of the solutions fixed tissues are immersed in prior to subsequent staining. Phosphomolybdic acid is also used as reagent for simple and rapid colorimetric determination of phenothiazine derivatives. PMA oxidizes the phenothiazine derivative to a cationic free radical, forming a coloured salt. A preliminary extraction is necessary if certain reductants (sulphite or ascorbic acid) are present as stabilizers, as they will reduce the reagent to phosphomolybdenum blue.
Also available as dry reagent: Phosphomolybdic acid hydrate
R11 - Highly flammable R34 - Causes burns R36/38 - Irritating to eyes and skin R67 - Vapours may cause drowsiness and dizziness R8 - Contact with combustible material may cause fire
Safety Codes:
S16 - Keep away from sources of ignition - No smoking S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection S45 - In case of accident or if you feel unwell seek medical advice immediately (show the label where possible)
Hazard Symbols:
C, F, Xi, O
Storage temperature :
2-8°C
RID/ADR certification :
UN 3264 8 / PG 2
x
Alternative Distributors of [Phosphomolybdic acid solution]
Producers or manufacturers change the product range from time to time. Currently there are no other manufacturers known.
Element: 
Chemical-Suppliers.eu