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Sodium dihydrogen phosphate(CAS#89140-32-9) Featured Image
  • Sodium dihydrogen phosphate(CAS#89140-32-9) 1

Sodium dihydrogen phosphate(CAS#89140-32-9)

Chemical Property:

Molecular Formula H3O4P.Na
Molar Mass 119.977
Density 1.40g/mLat 20°C
Melting Point <0°C
Boling Point 100°C
Water Solubility Soluble in water. Insoluble in alcohol,ether and chloroform.
Solubility H2O: 5M, clear, colorless
Vapor Presure 0Pa at 20℃
Appearance Crystalline powder
Color White
Maximum wavelength(λmax) ['λ: 260 nm Amax: ≤0.025',
, 'λ: 280 nm Amax: ≤0.02']
Merck 14,8660
BRN 3903772
pKa (1) 2.15, (2) 6.82, (3) 12.38 (at 25℃)
PH 4.0 – 4.5 (25℃, 50g/L in water)
Storage Condition room temp
Stability Stable. Incompatible with heavy metals, strong acids.
Sensitive Hygroscopic
MDL MFCD00003527
Physical and Chemical Properties Melting point <0°C
boiling point 100°C
density 1.40g/mL at 20°C

storage conditions Store at RT.
solubility H2O: 5 M, clear, colorless

form powder

sensitive hygropic
Merck 14,8660
Use Used in boiler water treatment, electroplating, leather making, dye, medicine, food and other industries

Product Detail

Product Tags

Hazard Symbols Xi – Irritant
Risk Codes R36/37/38 – Irritating to eyes, respiratory system and skin.
R36 – Irritating to the eyes
Safety Description S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36 – Wear suitable protective clothing.
S39 – Wear eye / face protection.
WGK Germany 1
RTECS WA1900000
FLUKA BRAND F CODES 3
TSCA Yes
HS Code 28352200
Toxicity LD50 orally in Rabbit: 8290 mg/kg LD50 dermal Rabbit > 7940 mg/kg

 

Introduction

Tasteless. Micro moisture absorption. Heating to 225-250 ℃ to produce acidic sodium pyrophosphate, 350-400 ℃ to form sodium metaphosphate. Median lethal dose (rat, muscle) 250mg/kg. Easily soluble in water, the aqueous solution is acidic, can agglomerate in humid air, and is almost insoluble in ethanol. When heated to 100 ℃, it dehydrates, generates sodium pyrophosphate at 190-210 ℃, and decomposes into sodium metaphosphate at 280-300 ℃. Solubility in water: 850g/L (20°C)

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