Citric acid Monohydrate CAS#5949-29-1

Boiling point 

248.08°C (rough estimate)

density 

1.67 g/cm3 at 20 °C

bulk density

560kg/m3

vapor density 

7.26 (vs air)

vapor pressure 

<0.1 hPa (20 °C)

refractive index 

1.493~1.509

FEMA 

2306 | CITRIC ACID

Fp 

100 °C

storage temp. 

2-8°C

solubility 

Citric acid also dissolves in absolute (anhydrous) ethanol (76 parts of citric acid per 100 parts of ethanol) at 15 °C.

form 

grit

pka

3.14(at 20℃)

color 

White

PH

3.24(1 mM solution);2.62(10 mM solution);2.08(100 mM solution);

Odor

Odorless

biological source

synthetic

Odor Type

odorless

explosive limit

8%, 65°F

Water Solubility 

soluble in Water (1174g/L at 10°C, 1809g/L at 30°C, 3825g/L at 80°C).

Sensitive 

Hygroscopic

λmax

λ: 260 nm Amax: 0.20
λ: 280 nm Amax: 0.10

Merck 

14,2326

JECFA Number

218

BRN 

782061

Stability:

Stable. Incompatible with bases, strong oxidizing agents, reducing agents, metal nitrates.

InChIKey

KRKNYBCHXYNGOX-UHFFFAOYSA-N

LogP

-1.64

CAS DataBase Reference

77-92-9(CAS DataBase Reference)

NIST Chemistry Reference

1,2,3-Propanetricarboxylic acid, 2-hydroxy-(77-92-9)

EPA Substance Registry System

Citric acid (77-92-9)

Risk Statements 

41-36/37/38-36/38-37/38-34-36-35-61-60

Safety Statements 

26-39-37/39-24/25-36/37/39-45-36-53

RIDADR 

UN 1789 8/PG 3

WGK Germany 

1

RTECS 

GE7350000

F 

9

TSCA 

Yes

HS Code 

2918 14 00

Hazardous Substances Data

77-92-9(Hazardous Substances Data)

Toxicity

LD50 in mice, rats (mmol/kg): 5.0, 4.6 i.p. (Gruber, Halbeisen)