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인산 칼륨 이염기성

Potassium Phosphate, Dibasic

HCID 24450
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기본 정보개요이름 및 식별자물성안전 및 규제화학 및 산업관련 반응화합물 노트
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기본 정보

CAS
7758-11-4
표준 SMILES
O=P([O-])([O-])O.[K+].[K+]
InChIKey
ZPWVASYFFYYZEW-UHFFFAOYSA-L
분자식
K2HPO4
평균 분자량
174.176 g/mol
단동위원소 질량
173.88865848

개요

Dipotassium hydrogen phosphate is a potassium salt that is the dipotassium salt of phosphoric acid. It has a role as a buffer. It is an inorganic phosphate and a potassium salt.

이름 및 식별자

우선 이름
Potassium Phosphate, Dibasic
IUPAC
dipotassium;hydrogen phosphate
현지명
인산 칼륨 이염기성
영어명
Potassium Phosphate Dibasic
분자식
K2HPO4
분자량
174.18

이름 및 동의어

7758-11-4Dipotassium hydrogen phosphateDIPOTASSIUM PHOSPHATEPotassium phosphate dibasicDipotassium hydrogenphosphateDibasic potassium phosphatePotassium phosphate, dibasicPotassium dibasic phosphatePhosphoric acid, dipotassium saltDipotassium monophosphatePotassium monophosphateDipotassium orthophosphate
이름 더 보기
디베이직칼륨인산염디칼륨모노인산염디칼륨수소인산염디칼륨오르토인산염디칼륨인산염디칼륨인산염(K2HPO4)수소디칼륨인산염칼륨모노수소인산염칼륨모노인산염칼륨비인산염칼륨인산염(K2HPO4)인산칼륨이염기성인산,디칼륨염제2인산칼륨포타슘수소포스페이트인산칼륨2염기성인산칼륨이염기성(POTASSIUMPHOSPHATEDIBASIC)다이포타슘포스페이트포타슘모노포스페트(-)-에틸 2-하이드록시프로판오에이트K2HPO4DKPPOTASSIUM HYDROGEN PHOSPHATEDipotassium phosphate anhydrousPOTASSIUM BIPHOSPHATE
Dipotassium monohydrogen phosphateHydrogen dipotassium phosphatePotassium phosphate (dibasic)Dipotassium hydrogenorthophosphatedi-potassium hydrogen phosphateCI71S98N1ZPhosphoric acid, potassium salt (1:2)Dipotassium acid phosphate

데이터베이스 식별자

CAS
7758-11-4
PubChem CID
24450
DTXSID
DTXSID8035506
ChEMBL
CHEMBL1200459
ChEBI
CHEBI:131527
UNII
CI71S98N1Z
EC Number
231-834-5
Nikkaji
J43.941J

물성

구조 계산 물성

극성 표면적
83.4 Ų
수소 결합 공여자 수
1
수소 결합 수용자 수
4
회전 가능 결합 수
0
무거운 원자 수
7
형식 전하
0
복잡도
46.5

실험 및 물리화학적 성질

Chemical ClassesMetals -> Phosphates, Metallic Salts
Cosmetics · 2건

Cosmetic ingredients (Dipotassium Phosphate) -> CIR (Cosmetic Ingredient Review)

Buffering

pH · 2건

Between 8,7 and 9,4 (1 % solution)

PH= 8.8, DETERMINED IN A 1% SOLN

Food AdditivesEMULSIFIER OR EMULSIFIER SALT, NUTRIENT SUPPLEMENT, PH CONTROL AGENT, SEQUESTRANT, STABILIZER OR THICKENER -> FDA Substance added to food
Color/Form · 2건

White crystals

Colorless or white granules or powder

Solubility · 3건

Freely soluble in water. Insoluble in ethanol

Very sol in water; 100 g dissolves rapidly & completely in 67 g cold water

Slightly sol in alcohol

Human Drugs · 2건

FDA approved drugs -> Active ingredient

FDA approved drugs -> Active ingredient

Animal DrugsPharmaceuticals -> UK Veterinary Medicines Directorate List
Melting PointDecomp

안전 및 규제

안전 정보는 참고용이며, 공급업체의 물질안전보건자료(SDS), 관련 법규 및 전문가 평가를 대체하지 않습니다.

GHS 분류

GHS Classification · 5건

This chemical does not meet GHS hazard criteria for 48.2% (580 of 1203) of reports.

Danger

H315 (40.7%): Causes skin irritation [Warning Skin corrosion/irritation]

P264, P264+P265, P280, P302+P352, P305+P354+P338, P317, P321, P332+P317, and P362+P364 (click each P-code to see the statement)

Aggregated GHS information provided per 1203 reports by companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

유해성 정보

Regulatory Information · 3건

Chemical: Phosphoric acid, dipotassium salt

REACH registered substance: Dipotassium hydrogenorthophosphate (EC: 231-834-5)

Dipotassium phosphate: Does not have an individual approval but may be used under an appropriate group standard

Other Safety InformationIMAP assessments - Phosphoric acid, dipotassium salt: Human health tier I assessment
Hazards SummaryEmergency treatment: Potassium; Potassium salts are usually not toxic after ingestion in patients with normal renal function. [HSDB] A probable irritant; [CHEMINFO] May cause irritation; [MSDSonline]
FDA Requirements · 3건

Dipotassium phosphate used as a sequestrant in food for human consumption is generally recognized as safe when used in accordance with good manufacturing practice.

Dipotassium phosphate used as a sequestrant in animal drugs, feeds, and related products is generally recognized as safe when used in accordance with good manufacturing or feeding practice.

Potassium phosphates (mono-, di-, and tribasic) are indirect food additives for use only as a component of adhesives. /Potassium phosphates (mono-, di-, and tribasic)/

Special ReportsWHO; Diseases Caused by Phosphorus and Its Toxic Compounds; Early Detection of Occupational Diseases pg 53-62 (1986). Review of diseases and health related effects resulting from exposure to phosphorus or phosphorus cmpd.

화학 및 산업

약리 정보

Bionecessity · 2건

Phosphate is a major intracellular anion which participates in providing energy for metabolism of substances and contributes to important metabolic and enzymatic reactions in almost all organs and tissues. Phosphate exerts a modifying influence on calcium concentrations, a buffering effect on acid-base equilibrium, and has a major role in the renal excretion of hydrogen ions. /Phosphate/

Phosphate as nutrient is a limiting factor to plant growth. /Phosphate/

Protein BindingPhosphate is minimally protein bound, and highly concentrated in cells (intracellular concentrations are 100-fold higher than serum concentrations). Concentrations of phosphate in plasma are higher in children than in adults.
Pharmacodynamics · 1건

Phosphate is a major intracellular anion which participates in providing energy for metabolism of substances and contributes to important metabolic and enzymatic reactions in almost all organs and tissues. Phosphate exerts a modifying influence on calcium concentrations, a buffering effect on acid-base equilibrium, and has a major role in the renal excretion of hydrogen ions.

Mechanism of Action · 2건

Once phosphate gains access to the body fluids and tissues, it exerts little pharmacological effect. If the ion is introduced into the intestine, the absorbed phosphate is rapidly excreted. If large amounts are given by this route, much of it may escape absorption. Because this property leads to a cathartic action, phosphate salts are employed as mild laxatives.

Once phosphate gains access to the body fluids and tissues, it exerts little pharmacological effect. If the ion is introduced into the intestine, the absorbed phosphate is rapidly excreted. If large amounts are given by this route, much of it may escape absorption. Because this property leads to a cathartic action, phosphate salts are employed as mild laxatives. Inorganic phosphate poisoning following ingestion of laxatives that contain phosphate salts has been reported in adults and children. Ingestion of large amounts of sodium dihydrogen phosphate lowers urinary pH. If excessive phosphate salts are introduced intravenously or orally, they may prove toxic by reducing the concentration of Ca 2+ in the circulation and from the precipitation of calcium phosphate in soft tissues. /Phosphates/

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HRID 32790반응물로uspto-grants-2008_09
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HRID 32846반응물로uspto-grants-2008_09
HRID 36574 반응식
HRID 36574반응물로uspto-grants-1995_05
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HRID 61867반응물로uspto-grants-2016_09
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Food Contact Substances
FCS -> FDA Inventory of Food Contact Substances Listed in 21 CFR
Physical Description · 2건

Colourless or white granular powder, crystals or masses; deliquescent substance, hygroscopic

White partially hygroscopic solid; [Merck Index] Colorless or white odorless solid; Hygroscopic; [CHEMINFO] White odorless granules; [MSDSonline]

Other Experimental Properties · 2건

Converted into pyrophosphate by ignition; somewhat hygroscopic

Hygroscopic

물리화학적 성질

녹는점
340 °C · 340 °C
밀도
2 · 2,44 g/cm3
저장 조건
5 °C · Store at +5°C to +30°C.
용해도
2 O: · H2O: 1 M at 20 °C, 투명, 무색
물리적 상태
고체
색상
하얀색
수소이온지수(pH)
8.5 · 8.5-9.6 (25℃, 50mg/mL in H2O)
산도 계수 (pKa)
1 · (1) 2.15, (2) 6.82, (3) 12.38 (at 25℃)
냄새
냄새 없는
생물학적 소스
synthetic
수용성
1600 g/L · 1600g/L(20℃)
Merck
14 · 14,7658
안정성
안정적인. 흡습성.
화장품 원료 기능
부식 방지버퍼링
InChI
1S/2K.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2
InChIKey
ZPWVASYFFYYZEW-UHFFFAOYSA-L
SMILES
[K+].[K+].OP([O-])([O-])=O
LogP
-2.148 · -2.148 (est)
EPA
Dipotassium phosphate (7758-11-4)

화학적 성질

White crystalline powder

FIFRA Requirements · 2건

Dipotassium hydrogen phosphate is exempted from the requirement of a tolerance when used as a buffering agent in accordance with good agricultural practice as inert (or occasionally active) ingredients in pesticide formulations applied to growing crops only.

Residues of potassium phosphate are exempted from the requirement of a tolerance when used as a buffer in accordance with good agricultural practices as inert (or occasionally active) ingredients in pesticide formulations applied to growing crops or to raw agricultural commodities after harvest. /Potassium phosphate/

Hazard Classes and CategoriesSkin Irrit. 2 (40.7%)

안전 및 보호

Storage ConditionsPotassium phosphates injection should be stored at controlled room temperature. /Potassium phosphates/
Disposal Methods · 1건

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Allowable Tolerances · 2건

Dipotassium hydrogen phosphate is exempted from the requirement of a tolerance when used as a buffering agent in accordance with good agricultural practice as inert (or occasionally active) ingredients in pesticide formulations applied to growing crops only.

Residues of potassium phosphate are exempted from the requirement of a tolerance when used as a buffer in accordance with good agricultural practices as inert (or occasionally active) ingredients in pesticide formulations applied to growing crops or to raw agricultural commodities after harvest. /Potassium phosphate/

Protective Action Criteria (PAC) · 3건

17 [mg/m3]

190 [mg/m3]

1100 [mg/m3]

독성 정보

Toxicity Summary · 2건

The CIR Expert Panel concluded that the following 31 ingredients are safe in the present practices of use and concentration in cosmetics as described in this safety assessment, when formulated to be non-irritating...Dipotassium Phosphate...

Safe for use in cosmetics, with qualifications

Human Toxicity Excerpts · 5건

ACUTE POTASSIUM INTOXICATION BY MOUTH IS RARE BECAUSE LARGE SINGLE DOSES USUALLY INDUCE VOMITING & BECAUSE IN ABSENCE OF PREEXISTING KIDNEY DAMAGE, POTASSIUM IS RAPIDLY EXCRETED. /POTASSIUM SALTS/

SIDE EFFECTS OF /ORAL/ POTASSIUM SALTS MAY INCLUDE NAUSEA, VOMITING, DIARRHEA, AND ABDOMINAL DISCOMFORT. /POTASSIUM SALTS/

CLINICAL SIGNS AND SYMPTOMS OF /ORAL/ POTASSIUM OVERDOSAGE INCLUDE PARESTHESIAS OF THE EXTREMITIES, LISTLESSNESS, MENTAL CONFUSIONS, WEAKNESS OR HEAVINESS OF THE LEGS, FLACCID PARALYSIS, COLD SKIN, GRAY PALLOR, PERIPHERAL VASCULAR COLLAPSE WITH FALL IN BLOOD PRESSURE, CARDIAC ARRHYTHMIAS, AND HEART BLOCK. /POTASSIUM SALTS/

/IN POTASSIUM POISONING/ RESPIRATIONS ARE INITIALLY ACCELERATED BUT SKELETAL MUSCLE WEAKNESS MAY ADVANCE TO STAGE OF PARALYSIS. /POTASSIUM SALTS/

For more Human Toxicity Excerpts (Complete) data for DIPOTASSIUM PHOSPHATE (6 total), please visit the HSDB record page.

Non-Human Toxicity Excerpts · 5건

INVESTIGATED BY PLEDGET TECHNIQUE IN 1 ESOPHAGEAL STUDY WITH CATS, PRODUCED EXTENSIVE NECROSIS & ULCERATION. INGESTION MAY PRODUCE OROPHARYNGEAL BURNS, ESOPHAGITIS & GASTRITIS ACCOMPANIED BY ULCERATION, BLEEDING & DIARRHEA.

AFTER ORAL ADMIN OF 0.8 G/KG BODY WT FOR 14 OR 38 WK DOGS VOMITED, WERE CACHECTIC, & HAD ELEVATED CREATININE & BLOOD UREA NITROGEN. RENAL DAMAGE WAS MOST MARKED @ 38 WK, THERE WERE DISSEMINATED ATROPHY (USUALLY OF PROXIMAL TUBLES), FOCAL SCAR TISSUE & NEPHROCALCINOSIS.

ORALLY POISONED ANIMALS DIED FROM RESP FAILURE SOMETIMES FOLLOWING CONVULSIONS & ... GASTROENTERITIS, DEHYDRATION OF ORGANS & EARLY RENAL TUBULAR NECROSIS. /POTASSIUM SALTS/

/ORALLY POISONED ANIMALS/ SURVIVORS HAD ANOREXIA, POLYDIPSIA, POLYURIA, FEVER, CONVULSIVE MOVEMENTS & GI DISTURBANCES DURING FIRST 24 HR, BUT RAPIDLY RECOVERED ... . /POTASSIUM SALTS/

For more Non-Human Toxicity Excerpts (Complete) data for DIPOTASSIUM PHOSPHATE (8 total), please visit the HSDB record page.

Antidote and Emergency Treatment · 2건

Basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 6 to 12 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 mL/kg up to 200 mL of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool ... . Do not attempt to neutralize. Cover the skin burns with dry sterile dressings after decontamination ... . /Inorganic Bases/Alkaline Corrosives and Related Compounds/

Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious or in respiratory arrest. Early intubation, at the first signs of upper airway obstruction, may be necessary. Positive-pressure ventilation techniques with a bag-valve-mask device may be beneficial. Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start an IV of D5W TKO /SRP: "To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. Watch for signs of pulmonary edema. For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Consider drug therapy for pulmonary edema ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Inorganic Bases/Alkaline Corrosives and Related compounds/

RAIS Toxicity Values · 4건

1

PPRTV Current

4

PPRTV Current

Acceptable Daily Intakes · 1건

FAO/WHO EXPERT COMMITTEE ON FOOD ADDITIVES...RECOMMENDED.../LEVELS/ FOR TOTAL DIETARY PHOSPHORUS...UNCONDITIONAL ACCEPTANCE LEVEL /OF LESS THAN 30 MG/KG BODY WT/ IS CONSIDERED SAFE IN ANY TYPE OF DIET...CONDITIONAL ACCEPTANCE LEVEL /OF 30-70 MG/KG BODY WT/ IS ACCEPTABLE ONLY WHEN DIETARY CALCIUM LEVEL IS HIGH /PHOSPHATES/

Hazard Quotient Level 0.1 or Cancer Risk Level 1E-06 · 6건

7.80e+04

1.20e+06

2.00e+04

1.5E+01(G)

1.00e+00

Volatile

Hazard Quotient Level 3 or Cancer Risk Level 1E-04 · 6건

2.30e+05

3.50e+06

6.00e+04

1.5E+01 (G)

1.00e+00

Volatile

규제 정보

FDA Requirements · 3건

Dipotassium phosphate used as a sequestrant in food for human consumption is generally recognized as safe when used in accordance with good manufacturing practice.

Dipotassium phosphate used as a sequestrant in animal drugs, feeds, and related products is generally recognized as safe when used in accordance with good manufacturing or feeding practice.

Potassium phosphates (mono-, di-, and tribasic) are indirect food additives for use only as a component of adhesives. /Potassium phosphates (mono-, di-, and tribasic)/

FIFRA Requirements · 2건

Dipotassium hydrogen phosphate is exempted from the requirement of a tolerance when used as a buffering agent in accordance with good agricultural practice as inert (or occasionally active) ingredients in pesticide formulations applied to growing crops only.

Residues of potassium phosphate are exempted from the requirement of a tolerance when used as a buffer in accordance with good agricultural practices as inert (or occasionally active) ingredients in pesticide formulations applied to growing crops or to raw agricultural commodities after harvest. /Potassium phosphate/

안전 데이터

wgk
3
tsca
TSCA listed
rtecs
TC8450000
독성
LD50 orally in Rabbit: 8000 mg/kg
HS 번호
28352400
risk_code
36-35-22
hazard_code
Xi,C,T,F
safety_code
22-24/25-36-26-45-36/37/39
기존화학 물질
KE-12167
F 고인화성물질
3
스토리지 클래스
13 - Non Combustible Solids
유해 물질 데이터
7758-11-4(Hazardous Substances Data)
Biological Half-LifeIn healthy children with phosphate overdose, half-life was 4.8 to 10.6 hours, and was prolonged to 17 hours in a child with renal insufficiency.
Metabolism/MetabolitesPhosphate is a major intracellular anion which participates in providing energy for metabolism of substances and contributes to important metabolic and enzymatic reactions in almost all organs and tissues.
FDA Pharmacological Classification · 4건

KALI PHOSPHORICUM

Potassium Compounds [CS]; Osmotic Laxative [EPC]; Osmotic Activity [MoA]; Inhibition Large Intestine Fluid/Electrolyte Absorption [PE]; Potassium Salt [EPC]; Increased Large Intestinal Motility [PE]

POTASSIUM PHOSPHATE, DIBASIC

Inhibition Large Intestine Fluid/Electrolyte Absorption [PE]; Osmotic Activity [MoA]; Potassium Compounds [CS]; Osmotic Laxative [EPC]; Increased Large Intestinal Motility [PE]; Potassium Salt [EPC]

Absorption, Distribution and Excretion · 6건

Potassium salts are well absorbed from gastro intestinal tract. Net phosphorus absorption may occur in the small intestine in some species but is primarily a function of the colon in horses.

Potassium is excreted primarily by kidney.

Distribution is largely intracellular, but it is the intravascular concentration that is primarily responsible for toxicity.

Phosphates are rapidly cleared by dialysis.

POTASSIUM SALTS ARE WELL ABSORBED FROM THE GASTROINTESTINAL TRACT. ... POTASSIUM IS EXCRETED PRIMARILY BY THE KIDNEY. /POTASSIUM SALTS/

Net phosphorus absorption may occur in the small intestine in some species but is primarily a function of the colon in horses. /SRP: Phosphates/

용도 및 제조

Uses · 6건

CIR ingredient: Dipotassium Phosphate

Used as a buffering agent and corrosion inhibitor in anti-freeze, a culture nutrient for the production of antibiotics, a sequestrant, an emulsifier in cheeses, and a buffer in coffee creamers; Also used in specialty fertilizers, paper-processing aids, and saline cathartics; [HSDB] Used as yeast nutrient, humectant, and laboratory reagent; [CHEMINFO]

Pulp and Paper Processing [Category: Industry]

Buffering agent in anti-freeze; nutrient in the culturing of antibiotics

Sequestrant; emulsifier in specified cheeses

Most of the commercial output of dipotassium phosphate is used in conjunction with borates, nitrites, nitrates, and/or silicates as corrosion inhibitor systems in ethylene glycol antifreeze formulations. Its second largest use is as a buffer in coffee creamers to prevent casein protein precipitation by coffee acids. Other uses include specialty fertilizers, paper-processing aids, and saline cathartics.

U.S. Production · 2건

(1973) PROBABLY GREATER THAN 5X10+9 G (USE)

(1975) 4.54-6.36X10+9 GRAMS (SUPPLY)

Consumption Patterns68-70% AS A CORROSION INHIBITOR FOR ANTIFREEZE; 29-30% AS A BUFFERING AGENT FOR COFFEE CREAMERS; MINOR AMOUNTS USED IN PAPER PROCESSING, AS FERTILIZER, AS YEAST NUTRIENT, IN PHARMACEUTICALS, & AS CHEMICAL REAGENTS (1973)
Methods of ManufacturingBY REACTING POTASSIUM CARBONATE OR POTASSIUM HYDROXIDE WITH PHOSPHORIC ACID.
Formulations/Preparations · 3건

INJECTION, 2 MEQ OF POTASSIUM ION AND 1 MEQ OF HYDROGEN PHOSPHATE ION PER ML WITH BENZYL ALCOHOL 0.9%; 30 ML VIALS; POWDER NATIONAL FORMULARY.

Grades: commercial; pure; highest purity; NF /National Formulary/; FCC /Food Chemicals Codex/

Solid and 50% active solution

Household ProductsInformation on 6 consumer products that contain Dipotassium phosphate in the following categories is provided:
Use Classification · 6건

Food additives

Food Additives -> ACIDITY_REGULATOR; SEQUESTRANT; YEAST_FOOD -> JECFA Functional Classes

Food Additives -> ACIDITY_REGULATOR; SEQUESTRANT; YEAST_FOOD -> JECFA Functional Classes

Food Additives -> ACIDITY_REGULATOR; SEQUESTRANT; YEAST_FOOD -> JECFA Functional Classes

Food Additives -> ACIDITY_REGULATOR; SEQUESTRANT; YEAST_FOOD -> JECFA Functional Classes

Food Additives -> ACIDITY_REGULATOR; SEQUESTRANT; YEAST_FOOD -> JECFA Functional Classes

General Manufacturing Information · 3건

Phosphoric acid, potassium salt (1:2): ACTIVE

THE PROPERTIES OF /POTASSIUM PHOSPHATE/ ... DI-SALTS GIVE THEM EXCELLENT POTENTIAL AS FERTILIZERS, BUT HERETOFORE THEY HAVE RECEIVED SCANT ATTENTION BY THE INDUSTRY BECAUSE OF HIGH COSTS OF PRODUCTION.

... CAN INACTIVATE METALLIC IONS, WHICH ARE CAPABLE OF INTERFERING WITH NECESSARY FOOD-PROCESSING REACTIONS ... /INACTIVATION IS/ EITHER BY PPTN & REMOVING THEM FROM INTERFERENCE WITH DESIRED FOOD-PROCESSING REACTIONS OR BY COMPLEXING & MAINTAINING THEM IN SOL, BOUND STATE. /PHOSPHATES/

응용 분야 · 3건

개요Potassium Phosphate Dibasic is a common source of phosphorus and potassium, which is often used as a fertilizer. It is also widely applied in the food industry, such as food additive and electrolyte replenisher for workout supplement. Another usage of Potassium Phosphate Dibasic is as a medicine, who serves as a diuretic or laxative. Besides, it is employed in the production of imitation dairy creamers to prevent coagulation and used in certain powders to prepare beverages. In addition, it is commonly seen in chemical laboratories for producing buffer solutions and trypticase soy agar which is used to make agar plates for culturing bacteria.

용도Potassium Phosphate Dibasic is the dipotassium salt of phosphoric acid which functions as a stabilizing salt, buffer, and sequestrant. It is mildly alkaline with a ph of 9 and is soluble in water with a solubility of 170 g/100 ml of water at 25°c. It improves the colloidal solubility of proteins. It acts as a buffer against variation in ph. For example, it is used in coffee whiteners as a buffer against ph variation in hot coffee and to prevent feathering. It also functions as an emulsifier in specified cheeses and as a buffering agent for processed foods. It is also termed dipotassium monohydrogen orthophosphate and dipotassium monophosphate.

일반 설명Potassium phosphate dibasic is a useful biological buffer having a pH in the range of 8.5-9.6. Potassium phosphate is present in various forms: monobasic (KH2PO4), dibasic (KH2PO4), and tribasic (K3PO4). Potassium phosphate buffers are widely employed in equilibrium dialysis, high performance liquid chromatography (HPLC) and affinity capillary electrophoresis studies.

제조 방법

Dipotassium phosphate is prepared by partial neutralization of phosphoric acid with potassium hydroxide, followed by crystallization:H3PO4+ 2KOH →K2HPO4+ 2H2O.

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상류 원료

암피실린 무수산염Phenolphthalein indicator수산화칼륨인산페놀프탈레인탄산 칼륨Indicator
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순도시험(1) 물불용물 : 이 품목 10g을「산성피로인산나트륨」의 순도시험 (1)에 따라 시험할 때, 그 양은 0.2% 이하이어야 한다. (2) 액성 : 이 품목의 수용액(1→100)의 pH는 8.7~9.3이어야 한다. (3) 비소 : 이 품목을 비소시험법에 따라 시험할 때, 그 양은 4.0ppm 이하이어야 한다. (4) 납 : 「메타인산나트륨」의 순도시험 (2)에 따라 시험한다(4.0ppm 이하). (5) 카드뮴 : 「메타인산나트륨」의 순도시험 (3)에 따라 시험한다(1.0ppm 이하). (6) 수은 : 이 품목을 수은시험법에 따라 시험할 때, 그 양은 1.0ppm 이하이어야 한다. (7) 불소화물 : 이 품목 1g을 정밀히 달아 「구연산칼슘」의 순도시험 (8)에 따라 시험한다(10ppm 이하).

확인시험(1) 이 품목의 수용액(1→20)에 페놀프탈레인시액 한 방울을 가하면 홍색을 나타낸다. (2) 이 품목의 수용액(1→20)은 확인시험법 중 칼륨염 및 인산염의 반응을 나타낸다.

정량법이 품목을 건조한 다음 약 3g을 정밀히 달아 물 50mL에 녹여 약 15℃로 유지하면서 1N 염산으로 적정한다(지시약 : 메틸오렌지․자일렌시아놀 FF시액 3~4방울).1N 염산 1mL = 174.2mg K2HPO4

정의ChEBI: A potassium salt that is the dipotassium salt of phosphoric acid.