Primary sodium phosphate

Synonyms sodium dihydrogen phosphate sodium orthophsophate, primary primary sodium phosphate sodium hiphosphate monobasic sodium phosphate... 

When primary sodium phosphate, NaH2P04, is dissolved, a weakly acid solution is obtained, this effect being due to the tendency of the second hydrogen radical of the acid to ionize. 

SYNS MONOSODIUM DIHYDROGEN PHOSPHATE MONOSODIUM PHOSPHATE MONOSORB XP-4 PRIMARY SODIUM PHOSPHATE SODIUM ACID PHOSPHATE SODIUM BIPHOSPHATE SODIUM BIPHOSPHATE anhydrous SODIUM DIHYDROGEN PHOSPHATE (1 2 1)... 

Acid sodium phosphate E339 Kalipol 32 monosodium orthophosphate monosodium phosphate phosphoric acid, monosodium salt primary sodium phosphate sodium biphosphate sodium dihydrogen orthophosphate sodium dihydrogen phosphate. 

These terms are also used to name salts of ortho-phosphoric acid (H3P04) in which one, two, or three of the hydrogen atoms have been replaced by metal or radicals NaH2P04 is primary sodium phosphate, Na2HPC)4is secondary sodium phosphate. The same system of names is used for salts of other acids containing three replaceable hydrogen atoms. 

Substrate concentration in the medium is 1 -2%. Incubation time is 24 72 h. The medium contains 5% dry yeast, 7% sugar and 5% primary sodium phosphate. Additional sugar is fed to the medium during the reaction. 

Sodium Phosphate, Monobasic. Sodium biphosphate sodium dihydrogen phosphate acid sodium phosphate monosodium orthophosphate primary sodium phosphate. H2Na04P mol wt 119.98. H 1.68%, Na 19.16%, O 53.34%, P 25.81%. NaHjPO.. It is about 99% pure. 

The three salts are also known by a number of other names, such as NaH2P04 primary sodium phosphate, primary sodium orthophosphate, sodium biphosphate, MSP Na2HP04 secondary sodium phosphate, secondary sodium orthophosphate,... 

Synonyms Acid sodium phosphate Monobasic sodium phosphate Monosodium dihydrogen phosphate Monosodium orthophosphate Monosodium phosphate MSP Phosphoric acid monosodium salt Primary sodium phosphate Sodium acid phosphate Sodium biphosphate Sodium dihydrogen phosphate Sodium dihydrogen phosphate (1 2 1) Sodium phosphate monobasic Sodium phosphate primary Classification Phosphate sait Empirical H2Na04P Formula NaHiPO,... 

Primary ammonium phosphate. See Ammonium phosphate Primary amyl acetate. See Amyl acetate Primary amyl alcohol. See n-Amyl alcohol Primary decyl alcohol. See Decyl alcohol Primary isoamyl alcohol. See Isoamyl alcohol Primary magnesium phosphate. See Magnesium phosphate monobasic Primary octyl alcohol. See Caprylic alcohol Primary sodium phosphate. See Sodium phosphate... 

Dissolve a protein or macromolecule containing primary amines at a concentration of 10 mg/ml in 50 mM sodium phosphate, 0.15 M NaCl, pH 7.2. Other non-amine-containing buffers such as borate, HEPES, and bicarbonate also may be used in this reaction. Avoid sulfhydryl-containing components in the reaction mixture as these will react with the pyridyl disulfide end of SPDP. The effective pH for the NHS ester modification reaction is in the range of 7-9, but hydrolysis will increase at the higher end of this range. 

The phosphate manufacturing and phosphate fertilizer industry includes the production of elemental phosphorus, various phosphorus-derived chemicals, phosphate fertilizer chemicals, and other nonfertilizer phosphate chemicals [1-30], Chemicals that are derived from phosphorus include phosphoric acid (dry process), phosphorus pentoxide, phosphorus penta-sulfide, phosphoms trichloride, phosphorus oxychloride, sodium tripolyphosphate, and calcium phosphates [8]. The nonfertilizer phosphate production part of the industry includes defluori-nated phosphate rock, defluorinated phosphoric acid, and sodium phosphate salts. The phosphate fertilizer segment of the industry produces the primary phosphorus nutrient source for the agricultural industry and for other applications of chemical fertilization. Many of these fertilizer products are toxic to aquatic life at certain levels of concentration, and many are also hazardous to human life and health when contact is made in a concentrated form. 

T. Graham found that a soln. of sodium dihydrophosphate gives a yellow precipitate of Ag3P04 with silver nitrate and two-thirds of the nitric acid is set free. W. Foster has measured the conductivity of dil. soln. of potassium dihydrophosphate, and F. Kohlrausch the specific conductivity. A. Joannis found that dry sodium or potassium dihydrophosphate did not absorb dry ammonia gas when the former salt was in contact with the liquid for 7 days at room temp, only insignificant amounts were absorbed. W. Windisch and W. Dietrich studied the action of boiling soln. of primary potassium phosphate with increasing proportions of calcium hydro-carbonate, and found the precipitates contained increasing proportions of tertiary calcium phosphate, with some entrained alkali. 

The bound peroxidase is visualized by reaction with a filtered solution of 0.05% DAB and 0.0005% hydrogen peroxide in PBS. After rinsing with 0.15 M sodium phosphate buffer (pH 7.4), the sections are postfixed with 0.25% osmium tetroxide in the same buffer for 1 hr and counterstained with 1% uranyl acetate in deionized water. The sections are dehydrated and flat-embedded in Epon according to standard procedures (Hayat, 2000a). Controls are processed as above, except that incubation in the absence of the primary antibody is carried out with PBS containing 2% normal serum and 0.015% Triton X-100. 

Free-floating sections (40 xm) of paraformaldehyde-fixed tissues are rinsed three times for 5 min each in 0.1 M sodium phosphate buffer (pH 7.4) (Jiao et al., 1999). They are transferred to 10-15 mM sodium citrate buffer (pH 8.5-9.0) preheated in a water bath kept in a conventional oven at 80°C for 30 min. The sections are allowed to remain in this buffer for 30 min to cool to room temperature. Following rinsing three times for 5 min each in the same buffer, the sections are treated by immersion in 0.3-3% nonfat dry milk in 0.1 % sodium azide for 30-60 min. The sections are then incubated in the primary antibody, diluted with a mixture of 0.3% Triton X-100, 0.01% sodium azide, 0.1 M sodium phosphate buffer (pH 7.4) (PBX), and 5% normal horse serum for 72 hr at 4°C under constant agitation. 

Primary calcium phosphate [Ca(H204)] is used in the manufacture of certain baking powders. In the presence of moisture, the acid phosphate reacts with sodium hydrogen carbonate (another constituent of such powders) to produce gaseous carbon dioxide, which causes the dough to rise. 

Give the formulas of primary, secondary, and tertiary sodium phosphates. State how the solution of each behaves with litmus. 

Acetone-Pis an unstable, white powder or crystalline mass with a melting point of 90 to 93 Celsius. The solid is insoluble in water, but soluble in ether and tetrahydrofuran. It is quite unstable and is rarely used in military or commercial explosives. However it can be utilized as a primary explosive in blasting caps or detonators when desensitized with appropriate materials. To do so, it should be mixed with gum Arabic, carbon black, tri sodium phosphate, chalk, or silicon dioxide powder, and then mixed with a small amount of paraffin s or saturated oils prior to use. Acetone-P can also be slurried with 10% water and 5% hexane for use in blasting caps or detonators. Pure acetone-P should not be used by itself, as it will decay over time potentially leading to explosions. Acetone-P is rather volatile, and a small sample left out in the open will completely evaporate after several days—partly due to decomposition. Acetone-P can also be used in initiating compositions when mixed with sulfur nitride or other primary explosives, and then added to a small amount of a saturated oil. The sulfur nitride and other primary explosives can be replaced by bari urn chromate, copper perchlorate, or lead chromate. Even when acetone-P has been successfully desensitized, it should be used withi n 2 weeks of preparation. ... 

Mobile phases The primary mobile phase for the pretreatment column was a mixture of 1/15 M sodium phosphate solution (adjusted to pH 3.5 with 1/15 M phosphoric acid) and methanol (48 52). The secondary mobile phase for the analytical column was the primary mobile phase containing 17.5 mM SDS. The tertiary mobile phase was the primary mobile phase containing 175 mM SDS. The flow rates of the primary, secondary and tertiary mobile phases were 0.9, 1.0 and 0.1 ml min-1 respectively. 

Oral sodium phosphate lowers plasma Ca concentrations and may offer short-term calcemic control of some patients with primary hyperparathyroidism who are awaiting surgery. However, the risk of precipitating calcium phosphate salts in soft tissues throughout the body is of concern. In light of satisfactory responses to other agents, administration of intravenous sodium phosphate is not recommended as a treatment for hypercalcemia. 

Materials Sodium bicarbonate, potassium acid tartrate, sodium aluminium alum, primary calcium phosphate, starch, commercial baking powder. 

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