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Phosphoric acid Structure

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).
InChIKey NBIIXXVUZAFLBC-UHFFFAOYSA-N
CAS DataBase Reference 7664-38-2(CAS DataBase Reference)
FDA 21 CFR 182.1073; 582.1073; 175.300; 310.545
Substances Added to Food (formerly EAFUS) PHOSPHORIC ACID
SCOGS (Select Committee on GRAS Substances) Phosphoric acid
EWG's Food Scores 1
FDA UNII E4GA8884NN
NCI Dictionary of Cancer Terms phosphoric; phosphoric acid
NIST Chemistry Reference Phosphoric acid(7664-38-2)
EPA Substance Registry System Phosphoric acid (7664-38-2)
Pesticides Freedom of Information Act (FOIA) Phosphoric acid

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H290-H302-H314
Precautionary statements P234-P270-P280-P301+P312-P303+P361+P353-P305+P351+P338
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
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
NFPA 704:
0
3 0

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