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Sodium phosphate monobasic

CAS Number: 7558-80-7

Chemical Formula:H3O4P.Na

Synonyms:

MONOBASICSODIUMPHOSPHATE,ANHYDROUS,USP

NATRIUMDIHYDROGENPHOSPHATE

SODIUMPHOSPHATEMONOBASIC,ANHYDROUS,FCC(BULK;SODIUMMONOBASICPHOSPHATE

Appearance: White power

HS Code: 28352200

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Products Description of Sodium phosphate monobasic CAS#7558-80-7

This substance has two main forms with distinct appearances: the anhydrous form is white powder or granules, and the dihydrate form is colorless to white crystals or crystalline powder. It is quite soluble in water, and its aqueous solution is acidic—usually with a pH value around 4.5. It is almost insoluble in ethanol and only slightly soluble in chloroform.

Parameters

Melting point	<0°C
Boiling point	100°C
bulk density	940kg/m3
density	1.40 g/mL at 20 °C
vapor pressure	0Pa at 20℃
storage temp.	room temp
solubility	H2O: 5 M, clear, colorless
form	powder
color	White
Odor	at 100.00?%. odorless
PH	4.0 - 4.5 (25℃, 50g/L in water)
pka	(1) 2.15, (2) 6.82, (3) 12.38 (at 25℃)
Water Solubility	Soluble in water. Insoluble in alcohol,ether and chloroform.
λmax	λ: 260 nm Amax: ≤0.025 λ: 280 nm Amax: ≤0.02
Sensitive	Hygroscopic
Merck	14,8660
BRN	3903772
Stability:	Stable. Incompatible with heavy metals, strong acids.
InChIKey	AJPJDKMHJJGVTQ-UHFFFAOYSA-M
LogP	-2.148 (est)
CAS DataBase Reference	7558-80-7(CAS DataBase Reference)
EPA Substance Registry System	Monosodium phosphate (7558-80-7)
Absorption	≤0.2 at 260 in H2O at 1M ≤0.2 at 280 in H2O at 1M

Safety Information

Hazard Codes	Xi
Risk Statements	36/37/38-36
Safety Statements	26-36-39
WGK Germany	1
RTECS	WA1900000
F	3
TSCA	Yes
HS Code	28352200
Hazardous Substances Data	7558-80-7(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 8290 mg/kg LD50 dermal Rabbit > 7940 mg/kg

Product Application of Sodium phosphate monobasic CAS#7558-80-7

Sodium phosphate monobasic monohydrate has multiple applications across industries. In food and analytical chemistry, it is used as a sequestrant, emulsifier, dyeing mordant, reagent, and buffer. It is also applied as a fireproofing agent and to add weight to silk during tanning processes. Additionally, it is employed in manufacturing enamels, ceramics, detergents, and boiler compounds, and serves as a substitute for borax in soldering and brazing.

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