Merck 104873 0250 Potassium Dihydrogen Phosphate Gr For Analysis iso 250 GR.

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Description
Catalogue Number	104873
Synonyms	mono-Potassium orthophosphate, Potassium biphosphate, Potassium phosphate monobasic

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Product Information
CAS number	7778-77-0
EC number	231-913-4
Grade	ISO
Hill Formula	H₂KO₄P
Chemical formula	KH₂PO₄
Molar Mass	136.09 g/mol
HS Code	2835 24 00
Quality Level	MQ300

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Physicochemical Information
Density	2.33 g/cm3 (21.5 °C)
Melting Point	252.6 °C (decomposition)
pH value	4.2 - 4.6 (20 g/l, H₂O, 20 °C)
Vapor pressure	<0.1 hPa (25 °C)
Bulk density	1200 kg/m3
Solubility	208 g/l

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Toxicological Information
LD 50 dermal	LD50 Rabbit > 4640 mg/kg

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Safety Information according to GHS
RTECS	TC6615500
Storage class	10 - 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water
Disposal	14\nInorganic 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).

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

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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

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Specifications
Assay (alkalimetric, calculated on dried substance)	99.5 - 100.5 %
Assay (alkalimetric; dried substance)	≥ 99.5 %
pH-value (5 %; water)	4.2 - 4.5
Chloride (Cl)	≤ 0.0005 %
Sulfate (SO₄)	≤ 0.003 %
Total nitrogen (N)	≤ 0.001 %
Heavy metals (as Pb)	≤ 0.0010 %
As (Arsenic)	≤ 0.0002 %
Cu (Copper)	≤ 0.0003 %
Fe (Iron)	≤ 0.0010 %
Na (Sodium)	≤ 0.02 %
Pb (Lead)	≤ 0.001 %
Reducing substances	passes test
Loss on drying (110 °C)	≤ 0.2 %
Loss on drying (130 °C)	≤ 0.2 %
Correspons to ISO