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A6714412

Potassium biphthalate , SP , 877-24-7

Synonym(s):
Potassium hydrogen phthalate;KHP;Potassium biphthalate;buffer solution;Potassium phthalate monobasic

CAS NO.:877-24-7

Empirical Formula: C8H5KO4

Molecular Weight: 204.22

MDL number: MFCD00146206

EINECS: 212-889-4

Pack Size Price Stock Quantity
25G RMB46.40 In Stock
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Update time: 2022-07-08

PRODUCT Properties

Melting point: 295-300 °C (dec.) (lit.)
Boiling point: 98.5-99.5 ;°C/740 ;mmHg(lit .)
Density  1.006 g/mL at 20 °C
storage temp.  Store at +5°C to +30°C.
solubility  H2O: 100 mg/mL, clear, colorless
form  Solid
color  White
PH 4.00-4.02 (25.0℃±0.2℃, 0.05M)
Odor Odorless
PH Range 3.8 - 4.0 (5% aq. sol.)
Water Solubility  80 G/L (20 ºC)
Merck  14,7612
BRN  3637128
Stability: Stable. Incompatible with strong oxidizing agents.
InChIKey IWZKICVEHNUQTL-UHFFFAOYSA-M
LogP -2.73

Description and Uses

Potassium hydrogen phthalate [KHP; pH(S) = 4.005 (25 °C)] is a certified secondary standard reference material used as a calibration buffer standard for pH instruments or pH electrodes.

Safety

Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H315-H319
Precautionary statements  P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313
Hazard Codes  Xi,C,T
Risk Statements  36/38-36/37/38-34-61-60
Safety Statements  26-36-24/25-22-45-36/37/39-53
RIDADR  UN 1789 8/PG 3
WGK Germany  1
RTECS  CZ4326000
34
TSCA  Yes
HS Code  29173990
Toxicity LD50 orally in Rabbit: > 3200 mg/kg

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