7664-38-2 H3O4P Phosphorous acid CAS NO.7664-38-2

phosphorous acid basic information

product name:	phosphorous acid
synonyms:	fema 2900;extran(r) ap 21;extran(r) ap21, acid rinse detergent with phosphoric acid;extran(r) ap21 detergent;extran ap 21;h3po4;u.n. 1805;acide phosphorique
cas:	7664-38-2
mf:	h3o4p
mw:	98
einecs:	231-633-2
product categories:	inorganic & organic chemicals;inorganics;hplc;hplc buffer;hplc buffers;hplc buffers - solutionchromatography/ce reagents;solution;palphabetic;analytical standards;nmrstable isotopes;p;per - pola;spectroscopy;alphabetical listings;flavors and fragrances;o-p;organic phosphonates;inorganic acid;hplc and lcms mobile phase additive
mol file:	7664-38-2.mol

phosphorous acid chemical properties

mp	~40 °c(lit.)
bp	158 °c(lit.)
density	1.685 g/ml at 25 °c(lit.)
vapor density	3.4 (vs air)
vapor pressure	2.2 mm hg ( 20 °c)
refractive index	n20/d 1.433
fema	2900
solubility	h2o: soluble
color	≤10(apha)
water solubility	miscible
merck	14,7344
cas database reference	7664-38-2(cas database reference)
nist chemistry reference	phosphoric acid(7664-38-2)
epa substance registry system	phosphoric acid(7664-38-2)

safety information

hazard codes	c,xn,t,f
risk statements	34-35-22-39/23/24/25-36/38-23/24/25-11
safety statements	7-16-26-36/37-45-36/37/39-1/2-24/25
ridadr	un 3453 8/pg 3
wgk germany	3
rtecs	tb6300000
f	3-10
hazardclass	8
packinggroup	iii
hazardous substances data	7664-38-2(hazardous substances data)

msds information

phosphorous acid usage and synthesis

chemical properties	clear liquid
usage	phosphorous acid is used for reaction with inorganic and organic products, for water treatment, industrial and agricultural uses. it is also used to bleach industrial and cleaning supplies. contact
general description	a clear colorless liquid or transparent crystalline solid. the pure solid melts at 42.35°c and has a density of 1.834 g / cm3. liquid is usually an 85% aqueous solution. shipped as both a solid and liquid. corrosive to metals and tissue. used in making fertilizers and detergents and in food processing.
air & water reactions	soluble in water with small release of heat.
reactivity profile	phosphorous acid reacts exothermically with bases. may react with active metals, including such structural metals as aluminum and iron, to release hydrogen, a flammable gas. can initiate the polymerization of certain classes of organic compounds. reacts with cyanide compounds to release gaseous hydrogen cyanide. may generate flammable and/or toxic gases in contact with dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and strong reducing agents. forms explosive mixture with nitromethane. reacts violently with sodium tetrahydroborate. in the presence of chlorides can corrode stainless steel to form explosive hydrogen gas. emits toxic and irritating fumes of oxides of phosphorus when heated to decomposition [lewis, 3rd ed., 1993, p. 1029].
health hazard	burns on mouth and lips, sour acrid taste, severe gastrointestinal irritation, nausea, vomiting, bloody diarrhea, difficult swallowing, severe abdominal pains, thirst, acidemia, difficult breathing, convulsions, collapse, shock, death.
fire hazard	non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). contact with metals may evolve flammable hydrogen gas. containers may explode when heated.

phosphorous acid preparation products and raw materials

raw materials

hydrogen peroxide-->celite -->phosphorus-->barium hydroxide -->white phosphorus-->rock phosphate-->phosphate rock powder-->phosphoric acid by wet process-->ammonium hydrogen sulfate-->sodium molybdate dihydrate-->calcium sulfate hemihydrate-->microvoid filter film

preparation products

pyrophosphoric acid-->amphoteric polyacrylamide-->3-methylthiophene-2-carbonyl chloride-->ferric pyrophosphate-->iodocyclohexane-->2-acetyl-5-cyanothiophene-->alcohol polyoxyethylene ether phosphoric monoester ethanolamine-->zinc phosphate, monobasic-->aluminium phosphate-->phosphatizing liquid-->sodium dihydrogen phosphate-->cefcapene pivoxil-->acid modified starch-->aluminum dihydrogen phosphate-->4-chromanone-->2-acetyl-3-methylthiophene-->2-(2-bromoethyl)-1,3-dioxolane-->4,4'-bis(bromomethyl)biphenyl-->calcium phosphate-->maddrell's salt for food-->tsp-->sewerage inhibitor-->phosphatizing agent-->starch, phosphate-->4'-ethoxyacetophenone-->conditioner for metal surface-->sodium phosphotungstate-->monosodium phosphate-->magnesium hydrogen phosphate trihydrate-->ammonium phosphomolybdate-->2-acetyl-5-iodothiophene-->magnesium phosphate-->alendronic acid-->sodium hydrogenphosphate dihydrate-->zinc dihydrogen phosphate-->phosphomolybdic acid hydrate-->hydration catalyst for propylene-->tetrabutylammonium phosphate-->non-dip adhesive nodule-holeless honeycomb structural adhesive j-23-2-->aluminum triphosphate

hennan sunlake enterprise corporation is located in henan province , the central plain of china , which enjoys favorable geogeaphical position and convenient transportion, the com[any was established in june. 1998 , until now having more than 18 years experience in manufacturing & exporting chemical raw material .

sunlake is a professional manufacturer engaged in producing and selling chemicals,including organic & inorganic chemicals , pigments & dyestuffs , water treatment chemicals , food & feed additives and others . these products have been being well exported to europe , southeast asia , the middle east , africa , south america and some other countries and areas.

we sincerely welcome foreign friends to visit our plant for cooperation. with the idea of "quality first,credit priority, excellent service", we are highly acknowledged by customers for good quality and competitive price. more importantly , the company has a strong r & d team, who are professional engineers and scholars with ph. d. .so we are confident to serve you better with our high - quality products and professional team.

we are taking great efforts to provide our customers with demanded goods and professional services, and continuously improve our core ability of competition and get the momentum for sustainable development, and finally make us being a reliable and professional wupplier in international market.

we welcome any serious inquiries from all customers of the world, and sincerely hope to cooperate with you for a brilliant future!