[033351] CAS 877-24-7 | Potassium hydrogen phthalate, primary standard, ACS, 99.95-100.05%

CAS : 877-24-7
MDL : MFCD00013070
EINECS : 212-889-4

Other name :

Phthalic acid monopotassium saltPotassium biphthalate

Chemical Properties

Formula : C8H5KO4
Formula weight : 204.23
Melting Point : 297° dec.
Density : 1.636
Sensitivity : Ambient temperatures.
Form : White crystalline powder
Solubility : Soluble in water. Slightly soluble in alcohol.

Applications

As a primary standard for preparing volumetric alkali solutions and as a buffer in pH determinations. Potassium hydrogen phthalate is used as a primary standard for acid- base titrations as well as for calibrating pH meters. It acts as a buffer in pH determination. It finds application as a useful standard for total organic carbon testing.

Grade Specifications

Maximum level of impurities: Insoluble matter 0.005%, pH of a 0.05M solution 4.0 at 25�, Cl 0.003%, S 0.002%, Heavy Metals (as Pb) 5ppm, Fe 5ppm, Na 0.005%

GHS Hazard and Precautionary Statements

Hazard Statements : H312-H303Harmful in contact with skin.May be harmful if swallowed.
Precautionary Statements : P280-P302+P352-P322-P312-P363-P501aWear protective gloves/protective clothing/eye protection/face protection.IF ON SKIN: Wash with plenty of soap and water.Specific measures (see label).Call a POISON CENTER or doctor/physician if you feel unwell.Wash contaminated clothing before reuse.Dispose of contents/container in accordance with local/regional/national/international regulations.

Other References :

Beilstein : 3637128Merck : 14,7612