potassium biphthalate
1,2-benzenedicarboxylic acid, potassium salt (1:1)
None found
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      P0309 Potassium Hydrogen Phthalate >99.8%(T)
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potassium;2-carboxybenzoate (Click)
CAS Number: 877-24-7Picture of molecule
ECHA EINECS - REACH Pre-Reg: 212-889-4
FDA UNII: GG9121M623
Nikkaji Web: J60.336H
Beilstein Number: 3637128
MDL: MFCD00013070
Molecular Weight: 204.22295000
Formula: C8 H5 K O4
BioActivity Summary: listing
NMR Predictor: Predict (works with chrome or firefox)
Category: buffering agents
US / EU / FDA / JECFA / FEMA / FLAVIS / Scholar / Patent Information:
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Physical Properties:
Assay: 95.00 to 100.00 % 
Food Chemicals Codex Listed: No
Soluble in:
 water, 1e+006 mg/L @ 25 °C (est)
 water, 8.33E+04 mg/L @ C (exp)
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Organoleptic Properties:
Odor and/or flavor descriptions from others (if found).
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Cosmetic Information:
CosIng: cosmetic data
Cosmetic Uses: buffering agents
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BOC Sciences
For experimental / research use only.
Potassium hydrogen phthalate >99.8%(T)
EMD Millipore
For experimental / research use only.
Potassium hydrogen phthalate
Santa Cruz Biotechnology
For experimental / research use only.
Potassium phthalate monobasic 99%
For experimental / research use only.
Potassium hydrogen phthalate BioXtra, ≥99.95%
For experimental / research use only.
Potassium Hydrogen Phthalate >99.8%(T)
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Safety Information:
Preferred SDS: View
Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
oral-rat LD50  > 3200 mg/kg
Kodak Company Reports. Vol. 21MAY1971

Dermal Toxicity:
skin-guinea pig LD50 > 1000 mg/kg
Kodak Company Reports. Vol. 21MAY1971

Inhalation Toxicity:
Not determined
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Safety in Use Information:
Category: buffering agents
Recommendation for potassium biphthalate usage levels up to:
 not for fragrance use.
Recommendation for potassium biphthalate flavor usage levels up to:
 not for flavor use.
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Safety References:
EPI System: View
Env. Mutagen Info. Center: Search
EPA Substance Registry Services (TSCA): 877-24-7
EPA ACToR: Toxicology Data
EPA Substance Registry Services (SRS): Registry
Laboratory Chemical Safety Summary : 23676735
National Institute of Allergy and Infectious Diseases: Data
WGK Germany: 2
Chemidplus: 0000877247
RTECS: CZ4326000 for cas# 877-24-7
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NIST Chemistry WebBook: Search Inchi
Canada Domestic Sub. List: 877-24-7
Pubchem (cid): 23676735
Pubchem (sid): 134981238
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Other Information:
(IUPAC): Atomic Weights of the Elements 2009
(IUPAC): Atomic Weights of the Elements 2009 (pdf)
Videos: The Periodic Table of Videos
tgsc: Atomic Weights use for this web site
(IUPAC): Periodic Table of the Elements
HMDB (The Human Metabolome Database): Search
Export Tariff Code: 2917.39.7000
Haz-Map: View
ChemSpider: View
Wikipedia: View
RSC Learn Chemistry: View
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Potential Blenders and core components note
None Found
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Potential Uses:
 buffering agents 
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Occurrence (nature, food, other): note
 not found in nature
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1,2-benzenedicarboxylic acid, monopotassium salt
1,2-benzenedicarboxylic acid, potassium salt (1:1)
 hydrogen potassium phthalate
 phthalic acid, monopotassium salt
 potassium acid phthalate
 potassium hydrogen phthalate
monopotassium phthalate
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PubMed: [Simultaneous determination of trifluoroacetate, tetrafluoroborate and halide ions in ionic liquid by ion chromatography].
PubMed: [Determination of total mass and morphology analysis of heavy metal in soil with potassium biphthalate-sodium hydroxide by ICP-AES].
PubMed: Adsorption voltammetry of the scandium-alizarin red S complex onto a carbon paste electrode.
PubMed: Development of parenteral formulations and evaluation of the biological activity of the trypanocide drug benznidazole.
PubMed: [A research on the determination of trace secondary amines by reversed-phase high performance liquid chromatography with electrochemical detection].
PubMed: Carbon paste electrode for trace zirconium(IV) determination by adsorption voltammetry.
PubMed: Cloning and characterization of two K+ inward rectifier (Kir) 1.1 potassium channel homologs from human kidney (Kir1.2 and Kir1.3).
PubMed: Intracellular H+ inhibits a cloned rat kidney outer medulla K+ channel expressed in Xenopus oocytes.
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