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Description
Catalogue Number	101207
Replaces	AX1355-1; AX1355
Synonyms	Ammonium biphosphate, Ammonium phosphate dibasic, Diammonium hydrogen phosphate, Fyrex
Description	di-Ammonium hydrogen phosphate

Physicochemical Information
Density	1.620 g/cm3
Melting Point	155 °C (decomposition)
pH value	7.5 – 9.0 (132.1 g/l, H₂O, 25 °C)
Vapor pressure	0.076 Pa (20 °C)
Bulk density	800 – 1000 kg/m3
Solubility	690 g/l

Toxicological Information
LD 50 oral	LD50 Rat 6500 mg/kg
LD 50 dermal	LD50 Rabbit > 7950 mg/kg

Safety Information according to GHS
Storage class	10 – 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water
Disposal	14 Inorganic salts: Container I. Neutral solutions of the these salts: Container D. Before placing in Container D, check the pH with pH-Universal indicator strips (Item No. 109535).

Storage and Shipping Information
Storage	Store at +2°C to +30°C.

Transport Information
Declaration (railroad and road) ADR, RID	Kein Gefahrgut
Declaration (transport by air) IATA-DGR	No Dangerous Good
Declaration (transport by sea) IMDG-Code	No Dangerous Good

Specifications
Assay (acidimetric)	≥ 99.0 %
Insoluble matter	≤ 0.005 %
pH-value (5 %; water; 25 °C)	7.8 – 8.1
pH-value (20 %; water)	about 8
Chloride (Cl)	≤ 0.0005 %
Nitrate (NO₃)	≤ 0.001 %
Sulfate	≤ 0.004 %
Heavy metals (as Pb)	≤ 0.0005 %
Ca (Calcium)	≤ 0.001 %
Fe (Iron)	≤ 0.001 %
K (Potassium)	≤ 0.001 %
Mg (Magnesium)	≤ 0.0005 %
Na (Sodium)	≤ 0.001 %
Corresponds to ACS, Reag. Ph Eur

Merck 101207 0500 Ammonium Hydrogen Phosphate Gr For Analysis Acs 500 GR.