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Potassium dihydrogen phosphate

Introduction Solubility in water Uses Toxicity
Potassium dihydrogen phosphate
Potassium dihydrogen phosphate
CAS No.
7778-77-0
Chemical Name:
Potassium dihydrogen phosphate
Synonyms
kdp;MKP;WNK1;HSN2;PHA2C;HSAN2;prkwnk1;KIAA0344;MGC163339;MGC163341
CBNumber:
CB6122627
Molecular Formula:
H2KO4P
Formula Weight:
136.09
MOL File:
7778-77-0.mol

Potassium dihydrogen phosphate Properties

Melting point:
252.6 °C(lit.)
Density 
2.338 g/mL at 25 °C(lit.)
storage temp. 
Store at RT.
solubility 
H2O: 1.5 M at 20 °C, clear, colorless
form 
powder
color 
White transparent
PH
4.2-4.6 (20g/l, H2O, 20℃)
pka
(1) 2.15, (2) 6.82, (3) 12.38 (at 25℃)
Water Solubility 
222 g/L (20 ºC)
Sensitive 
Hygroscopic
Merck 
14,7659
InChIKey
GNSKLFRGEWLPPA-UHFFFAOYSA-M
CAS DataBase Reference
7778-77-0(CAS DataBase Reference)
EPA Substance Registry System
Phosphoric acid, monopotassium salt(7778-77-0)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  F,T,C,Xi,Xn
Risk Statements  36/38-35-22
Safety Statements  24/25-45-36/37/39-26
RIDADR  3260
WGK Germany  2
RTECS  TC6615500
TSCA  Yes
HS Code  28352400
Hazardous Substances Data 7778-77-0(Hazardous Substances Data)
Symbol(GHS):
Signal word:
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H313 May be harmful in contact with skin Acute toxicity,dermal Category 5 P312
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
Precautionary statements:
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P321 Specific treatment (see … on this label).
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P332+P313 IF SKIN irritation occurs: Get medical advice/attention.
P337+P313 IF eye irritation persists: Get medical advice/attention.

Potassium dihydrogen phosphate price More Price(105)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 04243 Potassium phosphate monobasic 98-100.5% (calc. to the dried substance) 7778-77-0 1kg $120 2017-11-08 Buy
Sigma-Aldrich 04243 Potassium phosphate monobasic 98-100.5% (calc. to the dried substance) 7778-77-0 6x1kg $247.7 2017-11-08 Buy
Alfa Aesar 10840 Potassium dihydrogen phosphate, Puratronic?, 99.999% (metals basis), Si 10ppm max 7778-77-0 100g $833 2017-11-08 Buy
Alfa Aesar 10840 Potassium dihydrogen phosphate, Puratronic?, 99.999% (metals basis), Si 10ppm max 7778-77-0 25g $240 2017-11-08 Buy
Strem Chemicals 93-1939 Potassium dihydrogen phosphate, 99+% (ACS) 7778-77-0 250g $32 2017-11-27 Buy

Potassium dihydrogen phosphate Chemical Properties,Uses,Production

Introduction

Potassium dihydrogen phosphate is a kind of highly efficient and rapid dissolving phosphorus and potassium compound fertilizer containing, phosphorus and potassium, two elements for providing the necessary nutrients for plant growth and development, being applicable to any soil and crop, especially being applicable to the treatment of regions of simultaneous lack of phosphorus and potassium nutrients and phosphorus-preferred and potassium-preferred crops. It is mostly used for root top dressing, seed soaking, and seed dressing, being able to yield significant effect. If it sued for the roots fertilization, it can be used as basal fertilizer, seed fertilizer or moderate-late phase topdressing.
Its aqueous solution can react with silver nitrate, generating yellow phosphorus dihydrogen phosphate precipitation, being able to be used as a differential reaction.
As potassium dihydrogen phosphate is expensive, there is less agricultural production. Therefore, it is generally applied of the soaking or root top dressing for application. For crop soaking, the commonly used concentration is 0.2%. After dipping 18~20h, the field can be sown after drying. For root top dressing, if spraying alone, the highest concentration can be 0.5%. If within the range of jointing-booting stage of wheat and rice, we can spray for 1 or 2 times during the cotton, rape early flowering phase. Upon spraying 2 times, the interval can be about 7 to 10 days with the liquid usage amount per acre being about 100~150kg. It can also be combined with other nutrients to be formulated into compound nutrition for foliage top-dressing. For example, the leaf fertilizer used for field crops in North China has its main ingredient be exactly potassium dihydrogen phosphate, urea and the addition inclusion of some trace elements. In recent years, the use of blade complex nutrition also mostly adopts the potassium dihydrogen phosphate as a high concentration and excellent hydrophilic phosphate and potassium fertilizer source. With the development of facilities of horticultural crops and drip irrigation, fertilizer irrigation, the increasing daily demand for potassium dihydrogen phosphate is also increasing.

Solubility in water

Dissolved grams per 100 ml of water at different temperatures (° C):
14.8 g/0 ° C; 18.3 g/10 ° C; 22.6 g/20 ° C; 28 g/30 ° C; 35.5 g /
50.2 g/60 ° C; 70.4 g/80 ° C; 83.5 g/90 ° C

Uses

(1) As feed phosphorus additives; In the food industry, it is used for the manufacture of baked goods, for leavening agent, flavoring agent, fermentation additives, nutritional fortifiers, yeast food. Also used as a buffer, chelating agent.
(2) It can be used as fertilizer, flavoring agent and the culture agent of brewing yeast; used for the preparation of buffer solution, also used in medicine and manufacturing of potassium metaphosphate.
(3) It can be used for the fertilization of rice, wheat, cotton, rape, tobacco, sugar cane, apple and other crops.
(4) It can be used as chromatography reagents and buffer, but also for the synthesis of medicine.
As a highly efficient fertilizer, it is suitable for all kinds of soil and crops. It can also used as a bacterial culture agent, the flavoring agent for the synthesis of sake and the raw material for making potassium metaphosphate. In medicine, it is used for the uric acidification as a nutritional agent.
(5) Used as feed nutritional supplements;As a quality improver, it has effects of improving the complexation metal ions and pH value, increasing the ionic strength of food, and thus improving the adhesion and water holding capacity of food. China provides that it can be used for wheat flour with the maximum usage amount of 5.0g/kg and 2.0 g/kg in the beverage.

Toxicity

Adl: 0 to 70 mg/kg (calculated as phosphorus, FA0 HO, 1985). It is generally recognized as being safe (US Food and Drug Administration, 1975). Cooked meat, cooked ham, cooked minced meat: 3 g/kg; low concentration milk, sweet condensed milk, cream 2 g/kg; milk powder, cream powder 5 g/kg; processed cheese 9 g/kg; quick-frozen Haddock, perch, ferret fish, hake fillet 5 g/kg; ready-to-eat broth, soup 1000 mg/kg; cold drink 2 g/kg. Adl: 0 to 70 mg/kg (total phosphate, in terms of phosphorus; FAO/WHO, 2001). ADI: no restriction (EEC, 1990).

Chemical Properties

White powder

Uses

Buffer solutions

Uses

In buffers for determination of pH. Pharmaceutic aid (buffering agent).

Potassium dihydrogen phosphate Preparation Products And Raw materials

Raw materials

Preparation Products


Potassium dihydrogen phosphate Suppliers

Global( 398)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Jiangsu Kolod Food Ingredients Co.,Ltd.
+86-518-85110578 18805133257
+86-518-85110578 sales3257@jskolod.com CHINA 88 60
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 20810 55
Mainchem Co., Ltd.
0592-6210733
0592-6210733 sales@mainchem.com CHINA 3270 55
Hangzhou FandaChem Co.,Ltd.
0086 158 5814 5714 (Mobile; WhatsApp; Telegram)
+86-571-56059825 fandachem@gmail.com CHINA 690 55
Shanghai Yingrui Biopharma Co., Ltd.
+86-21-33585366 E-mail:sales03@shyrchem.com
+86-21-34979012 sales03@shyrchem.com CHINA 660 60
Anhui Royal Chemical Co., Ltd.
+86-025-86736275
dana.jiang@royal-chem.com CHINA 778 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 info@tnjchem.com China 1410 55
Spectrum Chemical Manufacturing Corp. 021-67601398,18616765336,QQ:3475911745
021-57711696 mkt@spectrumchina.net China 9824 60
Shanghai Aladdin Bio-Chem Technology Co.,LTD 021-20337333/400-620-6333
021-50323701 sale@aladdin-e.com China 25120 65
Yonghua Chemical Technology (Jiangsu) Co., Ltd. +86-512-5254 9999 To 852
+86-512-5254 6337 chenshuping@yonghuachem.com China 686 60

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