Phosphoric acidCAS#7664-38-2

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

form 

Solid or Viscous Liquid

pka

2.1-7.2-12.3(at 25℃)

color 

≤10(APHA)

Specific Gravity

1.7

Odor

Odorless

PH

3.06(1 mM solution);2.26(10 mM solution);1.63(100 mM solution);

PH Range

1.5

biological source

synthetic

Water Solubility 

MISCIBLE

λmax

λ: 260 nm Amax: ≤0.05
λ: 280 nm Amax: ≤0.04

Merck 

14,7344

BRN 

1921286

Dielectric constant

61.0

Exposure limits

TLV-TWA 1 mg/m3 (ACGIH, MSHA, and OSHA); TLV-STEL 3 mg/m3 (ACGIH).

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)

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

OEB

C

OEL

TWA: 1 mg/m3, STEL: 3 mg/m3

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