Basic information
- Name:
Potassium dihydrogen phosphate
- CAS No.:
7778-77-0
- Molecular Structure:
- Formula:
- KH2PO4
- Molecular Weight:
- 136.08
- Deleted CAS:
- 943540-09-8
- Synonyms:
- Potassium phosphate (xK);Monopotassium phosphate (industrial grade);Potassiumphosphatemonobasic;Mono Potassium Phosphate(MKP);Mono-potassium phosphate (MKP);Potassium phosphate,monobasic;Monopotassium phosphate anhydrous;Monopotassium phosphate (MKP);Industrial Grade Monopotassium Phosphate MKP;Potassium Phosphate Monobasic ACS Powder;Orthophosphoric acid, monopotassium salt;Potassium hydrogen phosphate (KH2PO4);Phosphoric acid, monopotassium salt;Sorensens potassium phosphate;Potassium dihydrogenorthophosphate;Monopotassium Phosphate(MKP);Monopatassium phosphate;
- EINECS:
- 231-913-4
- Density:
- 2.338 g/mL at 25 °C(lit.)
- Melting Point:
- 252.6 °C(lit.)
- Solubility:
- water: 222 g/L (20 °C)
- Appearance:
- white powder
- Hazard Symbols:
F,
T,
C,
Xi- Risk Codes:
- 36/38-35-22
- Safety Description:
- 24/25-45-36/37/39-26 Details
- particular:
- particular
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Chemistry
IUPAC Name: potassium dihydrogen phosphate
Empirical Formula: H2KO4P
Molecular Weight: 136.0855
EINECS: 231-913-4
Structure of Potassium dihydrogen phosphate (CAS NO.7778-77-0):
Boiling Point: 158 °C at 760 mmHg
Melting Point: 252.6 °C(lit.)
Density: 2.338 g/mL at 25 °C(lit.)
Storage temp: Store at RT.
Solubility: H2O: 1.5 M at 20 °C, clear, colorless
Water Solubility: 222 g/L (20 ºC)
Sensitive: Hygroscopic
Vapour Pressure: 1.41 mmHg at 25°C
Product Categories: Inorganics;Anionic SolutionsChromatography;Anionic Standard SolutionsAlphabetic;Application CRMs;Ion Chromatography;Ion Chromatography Standards;P;PER - POLA
Canonical SMILES: OP(=O)(O)[O-].[K+]
InChI: InChI=1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1
InChIKey: GNSKLFRGEWLPPA-UHFFFAOYSA-M
Uses
Potassium dihydrogen phosphate (CAS NO.7778-77-0) is used as a fertilizer, a food additive and a fungicide. It is used in optical modulators and for non-linear optics such as SHG (second-harmonic generation).
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| rabbit | LD50 | skin | > 4640mg/kg (4640mg/kg) | National Technical Information Service. Vol. OTS0571153, | |
| rat | LDLo | oral | 4640mg/kg (4640mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) GASTROINTESTINAL: OTHER CHANGES | National Technical Information Service. Vol. OTS0571153, |
Safety Profile
Hazard Codes: 
F,
T,
C,
Xi
Risk Statements: 36/38-35-22
R36/38:Irritating to eyes and skin.
R35:Causes severe burns.
R22:Harmful if swallowed.
Safety Statements: 24/25-45-36/37/39-26
S24/25:Avoid contact with skin and eyes.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
RIDADR: 3260
WGK Germany: 2
RTECS: TC6615500
F: 8-10
HS Code: 28352400
Specification
Potassium dihydrogen phosphate , its cas register number is 7778-77-0. It also can be called Monobasic potassium phosphate ; Monopotassium dihydrogen phosphate ; Monopotassium monophosphate ; Monopotassium orthophosphate ; Monopotassium phosphate ; Orthophosphoric acid, monopotassium salt ; hosphoric acid, monopotassium salt ; Potassium acid phosphate ; Potassium dihydrogen orthophosphate ; Potassium orthophosphate, dihydrogen ; Potassium phosphate, monobasic ; Sorensen's potassium phosphate . Potassium dihydrogen phosphate (CAS NO.7778-77-0) is a white powder.