| CITRIC
ACID |
ICSC:
0855 |
| March
1998 |
|
2-Hydroxy-1,2,3-propanetricarboxylic
acid
beta-Hydroxytricarballylic acid
Anhydrous citric acid
|
|
|
| CAS #
|
77-92-9
|
C 6H
8O 7/CH
2COOH-C(OH)COOH-CH
2COOH |
| RTECS
# |
GE7350000
|
Molecular
mass: 192.1 |
|
TYPES
OF
HAZARD /
EXPOSURE |
ACUTE HAZARDS /
SYMPTOMS |
PREVENTION
|
FIRST
AID / FIRE FIGHTING |
| FIRE |
Combustible.
|
NO open flames.
|
Powder, water
spray, foam, carbon dioxide.
|
| EXPLOSION |
Finely dispersed
particles form explosive mixtures in air.
|
Prevent deposition
of dust; closed system, dust explosion-proof electrical equipment
and lighting.
|
|
|
| EXPOSURE |
|
PREVENT
DISPERSION OF DUST!
|
|
| Inhalation |
Cough. Shortness
of breath. Sore throat.
|
Ventilation
(not if powder).
|
Fresh air,
rest. Refer for medical attention.
|
| Skin |
Redness.
|
Protective
gloves.
|
Rinse skin
with plenty of water or shower. Refer for medical attention.
|
| Eyes |
Redness. Pain.
|
Safety goggles.
|
First rinse
with plenty of water for several minutes (remove contact lenses if
easily possible), then take to a doctor.
|
| Ingestion |
Abdominal pain.
Sore throat.
|
Do not eat,
drink, or smoke during work.
|
Rinse mouth.
Refer for medical attention.
|
| SPILLAGE
DISPOSAL |
PACKAGING
& LABELLING |
Sweep spilled
substance into containers; if appropriate, moisten first to prevent
dusting. Wash away remainder with plenty of water (extra personal
protection: P2 filter respirator for harmful particles).
|
|
| EMERGENCY
RESPONSE |
STORAGE
|
|
Separated from
strong oxidants, strong bases, metal nitrates and metals. Dry.
|
| IMPORTANT
DATA |
PHYSICAL
STATE; APPEARANCE:
COLOURLESS CRYSTALS
PHYSICAL DANGERS:
Dust explosion possible if in powder or granular form, mixed with
air.
CHEMICAL DANGERS:
The substance decomposes on heating above 175°C. The solution
in water is a medium strong acid. Reacts with oxidants and bases.
Attacks metal.
OCCUPATIONAL EXPOSURE LIMITS:
TLV not established. MAK not established.
|
ROUTES OF
EXPOSURE:
The substance can be absorbed into the body by inhalation and by ingestion.
INHALATION RISK:
Evaporation at 20°C is negligible; a nuisance-causing concentration
of airborne particles can, however, be reached quickly when dispersed.
EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract.
EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the teeth , resulting in erosion.
|
| PHYSICAL
PROPERTIES |
Decomposes
below boiling point at 175°C
Melting point: 153°C
Solubility in water, g/100 ml at 20°C: 59
|
Flash point:
100°C
Explosive limits, vol% in air: 0.28-2.29
Octanol/water partition coefficient as log Pow: -1.7
|
|