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Phosphoric acidCAS#7664-38-2

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Chemical Name：Phosphoric acid

CAS No7664-38-2

Molecular Formula：H3O4P

Molecular weight:98

Sample: Available

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Product Details

Products Description of Phosphoric acidCAS#7664-38-2

Phosphoric acid is also called orthophosphoric acid (molecular formula H3PO4). The pure product is a colorless, transparent, viscous liquid or orthorhombic crystal, odorless and very sour. 85% phosphoric acid is a colorless, transparent or slightly light-colored, viscous liquid. Melting point 42.35℃, specific gravity 1.70, high boiling point acid, miscible with water in any ratio, boiling point 213℃ (lose 1/2 water), then pyrophosphoric acid is generated. When heated to 300℃, it becomes metaphosphoric acid. Relative density 181.834. It is easily soluble in water and ethanol. Phosphoric acid is a common inorganic acid and a medium-strong acid. Its acidity is weaker than strong acids such as sulfuric acid, hydrochloric acid and nitric acid, but stronger than weak acids such as acetic acid, boric acid and carbonic acid. When phosphoric acid reacts with sodium carbonate at different pH, different acid salts can be generated. It can irritate the skin and cause inflammation, and damage body tissues. Concentrated phosphoric acid has an erosive effect when heated in porcelain. It is hygroscopic and should be stored in a sealed container. Commercially available phosphoric acid is a viscous concentrated solution containing 82% H3PO4. The high viscosity of phosphoric acid solution is due to the presence of hydrogen bonds in the solution.

Phosphoric acid Chemical Properties

Melting point	~40 °C(lit.)
Boiling point	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 \| PHOSPHORIC ACID
storage temp.	no restrictions.
solubility	H2O: soluble
pka	2.1-7.2-12.3(at 25℃)
form	Solid or Viscous Liquid
Specific Gravity	1.7
color	≤10(APHA)
PH	3.06(1 mM solution);2.26(10 mM solution);1.63(100 mM solution);
Odor	Odorless
PH Range	1.5
Water Solubility	MISCIBLE
λmax	λ: 260 nm Amax: ≤0.05 λ: 280 nm Amax: ≤0.04
Merck	14,7344
BRN	1921286
Exposure limits	TLV-TWA 1 mg/m3 (ACGIH, MSHA, and OSHA); TLV-STEL 3 mg/m3 (ACGIH).
Dielectric constant	61.0
InChIKey	NBIIXXVUZAFLBC-UHFFFAOYSA-N
LogP	-2.15
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
TSCA	Yes
HS Code	2809 20 00
HazardClass	8
PackingGroup	III
Hazardous Substances Data	7664-38-2(Hazardous Substances Data)
Toxicity	ADI 0 to 70 mg / kg (total phosphate content in terms of phosphorus, FAO / WHO, 2001). GRAS (FDA, § 182.1073, 2000). LD501530mg / kg (rat, oral). In case of daily intake of 2 ~ 4 g, it can cause mild diarrhea. The amount of sour agent used as a cola drink is 0.02% to 0.06%.
IDLA	1,000 mg/m3

Product Application of Phosphoric acidCAS#7664-38-2

Wet-process phosphoric acid is mainly used to manufacture various phosphates, such as ammonium phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, trisodium phosphate, etc. and condensed phosphates. Refined phosphoric acid is used to make calcium hydrogen phosphate for feed. It is used for phosphating of metal surfaces, preparing electrolytic polishing liquid and chemical polishing liquid for polishing of aluminum products. It is used in the pharmaceutical industry to manufacture sodium glycerophosphate, iron phosphate, etc., and is also used to manufacture zinc phosphate as a dental filling adhesive. It is used as a catalyst for the condensation of phenolic resins and a desiccant for the production of dyes and intermediates. It is used in the printing industry to prepare cleaning liquid for wiping off stains on offset color printing plates. It is also used to prepare matchstick impregnation liquid. It is used in the metallurgical industry to produce phosphoric acid refractory mud to increase the life of steelmaking furnaces. It is a coagulant for rubber slurry and a raw material for the production of inorganic adhesives. It is used as metal anti-rust paint in the coating industry.

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