Dinatriumhydrogenorthophosphat

Bezeichnung:Dinatriumhydrogenorthophosphat

CAS-Nr7558-79-4

Englisch Name:Sodium Phosphate, Dibasic

CBNumberCB1242667

SummenformelNa2HPO4

Molgewicht141.96

MOL-Datei7558-79-4.mol

Synonyma

Dinatriumhydrogenorthophosphat

Dinatriumorthophosphat

Natriumphosphat, dibasisch

Dinatriumhydrogenorthophosphat physikalisch-chemischer Eigenschaften

Schmelzpunkt	243-245 °C
Dichte	1.064 g/mL at 20 °C
Dampfdichte	4.9 (vs air)
Dampfdruck	0Pa at 20℃
FEMA	2398 \| DISODIUM PHOSPHATE
storage temp.	Store at +5°C to +30°C.
Löslichkeit	H₂O: 0.5 M at 20 °C, clear, colorless
Aggregatzustand	powder
Farbe	White
PH	8.9-9.2 (25℃, 50g/L in water)
pka	(1) 2.15, (2) 6.82, (3) 12.38 (at 25℃)
Geruch (Odor)	odorless
Wasserlöslichkeit	>=10 g/100 mL at 20 ºC
Sensitive	Hygroscopic
maximale Wellenlänge (λmax)	λ: 260 nm Amax: 0.019 λ: 280 nm Amax: 0.016
Merck	14,8659
Stabilität	Stable. Incompatible with strong acids. Hygroscopic.
InChIKey	BNIILDVGGAEEIG-UHFFFAOYSA-L
LogP	-2.15
CAS Datenbank	7558-79-4(CAS DataBase Reference)
EPA chemische Informationen	Disodium phosphate (7558-79-4)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	26-36-24/25
RIDADR	UN 3077 9 / PGIII
WGK Germany	3
RTECS-Nr.	WC4500000
F	3
TSCA	Yes
HS Code	28352200
Giftige Stoffe Daten	7558-79-4(Hazardous Substances Data)
Toxizität	LD50 orally in Rabbit: > 2000 mg/kg

Gefahreninformationscode (GHS)

Sodium Phosphate, Dibasic Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
WEISSE ODER FARBLOSE HYGROSKOPISCHE KRISTALLEODER PULVER
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen unter Bildung giftiger Rauche. Reagiert sehr heftig mit starken Säuren.
ARBEITSPLATZGRENZWERTE
TLV nicht festgelegt (ACGIH 2005).
MAK nicht festgelegt (DFG 2006).
INHALATIONSGEFAHREN
Eine schädliche Partikelkonzentration in der Luft kann schnell erreicht werden.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Der Stoff ist schwach reizend auf die Augen, die Haut und die Atemwege.
LECKAGE
Persönliche Schutzausrüstung: Atemschutzgerät, P2-Filter für schädliche Partikel. Verschüttetes Material in Behältern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern.
R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
Beschreibung
Sodium phosphate dibasic is highly hygroscopic and water soluble. Useful in conjunction with Sodium Phosphate, Monobasic in the preparation of biological buffers. It is commonly used in biological assay buffers. Sodium is required for nerve and muscle functioning. Sodium Phosphate Dibasic can be used as a dietary supplement and as a nutrient. Sodium hydrogen phosphate is used in food and water treatment in conjunction with trisodium phosphate.In foods, it is used to adjust pH. In water treatment, It retards calcium scale formation. It is also found in some detergents and cleaning agents. This product is known to be Used in many applications including the purification of antibodies. It is used as a saline laxative to treat constipation or to clean the bowel before a colonoscopy.
Chemische Eigenschaften
Disodium phosphate is anhydrous or contains two molecules of water of hydration
Chemische Eigenschaften
Sodium hydrogen phosphate,NaH2P04·H20, is hygroscopic, transparent, water-soluble crystals. Used as a purgative, reagent,and buffer.
Chemische Eigenschaften
The anhydrous compound is white crystalline powder; hygroscopic; density 1.70 g/cm3; converts to sodium pyrophosphate at 240°C; soluble in water; 874 SODIUM PHOSPHATE, DIBASIC insoluble in alcohol. The dihydrate is a crystalline powder or granular solid; density 2.066 g/cm3 at 15°C; loses water of crystallization at 92.5°C. The heptahydrate is a powdered or granular crystalline solid; density 1.679 g/cm3; loses five molecules of water at 48°C. The dodecahydrate is made up of translucent crystals or granules; density 1.524 g/cm3; readily loses five water molecules on exposure to air at ambient temperature; melts at 35°C when the salt contains all water of crystallization; loses all water at 100°C. All the hydrates are soluble in water and insoluble in alcohol.
Physikalische Eigenschaften
The anhydrous compound is white crystalline powder; hygroscopic; density 1.70 g/cm³; converts to sodium pyrophosphate at 240°C; soluble in water;insoluble in alcohol.
The dihydrate is a crystalline powder or granular solid; density 2.066 g/cm³ at 15°C; loses water of crystallization at 92.5°C.
The heptahydrate is a powdered or granular crystalline solid; density 1.679 g/cm³; loses five molecules of water at 48°C.
The dodecahydrate is made up of translucent crystals or granules; density 1.524 g/cm³; readily loses five water molecules on exposure to air at ambient temperature; melts at 35°C when the salt contains all water of crystallization; loses all water at 100°C.
All the hydrates are soluble in water and insoluble in alcohol.
Occurrence
Disodium phosphate is anhydrous or contains two molecules of water of hydration
Verwenden
Sodium Phosphate Dibasic is used as an in conjunction with trisodium phosphate in foods and water treatment. In foods, it is used to adjust pH. In water treatment, It retards calcium scale formation. It is also found in some detergents and cleaning agents. Sodium Phosphate Dibasic is used as a saline laxative to treat constipation or to clean the bowel before a colonoscopy.
Verwenden
It is used in pH buffer solutions.
Verwenden
Sodium Phosphate, Dibasic is used as a laboratory reagent and a buffer in chemical analysis. Other uses are in manufacturing ceramics, detergents, and enamels; as a mordant in dyeing; for fireproofing paper and wood; for weighting and printing silk; in the treatment of boiler water; as a sequestrant in food; as a dietary supplement; in soldering enamels; and in fertilizers. It is used therapeutically as a cathartic.
synthetische
Dibasic sodium phosphate is prepared by treating phosphoric acid with a slight excess of sodium carbonate. The solution is boiled to expel carbon dioxide. Upon cooling dodecahydrate crystallizes out. Heating dodecahydrate at 100°C forms the anhydrous salt.
H3PO4 + Na2CO3 → Na2HPO4 + CO2 + H2O
Dibasic sodium phosphate also is prepared by reacting dibasic calcium phosphate with sodium carbonate. The product calcium carbonate precipitates leaving dibasic sodium salt in the solution. The solution on cooling yields crystals of hydrated product.
CaHPO4 + Na2CO3 → CaCO3 + Na2HPO4
Definition
ChEBI: Disodium hydrogenphosphate is a sodium phosphate.
Allgemeine Beschreibung
Sodium phosphate dibasic in combination with sodium phosphate monobasic is used in the preparation of oral sodium phosphate solution (OSPS), which is a purgative used for bowel cleansing before colonoscopy.
Flammability and Explosibility
Non flammable
Biochem/physiol Actions
Sodium phosphate dibasic is an important component of running buffer of denaturing gel electrophoresis. It induces glomerular calcification as well as other nephrotic syndrome in Sprague-Dawley rats.
Sicherheitsprofil
Poison by intravenous route. Moderately toxic by intraperitoneal, subcutaneous, and intramuscular routes. Mildly toxic by ingestion. A skin and eye irritant. When heated to decomposition it emits toxic fumes of POx and Na2O. See also PHOSPHATES.
läuterung methode
Crystallise the salt twice from warm water, by cooling. Dry in air, then in an oven overnight at 130o. It should be dried before use as it is slightly hygroscopic. It forms di-, hepta-and deca-hydrates.

Sodium Phosphate, Dibasic Upstream-Materialien And Downstream Produkte

Dinatriumhydrogenorthophosphat Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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