MSDS Name:5-Fluorouracil 99%
Synonym:5-Fluoro-2,4(1H,3H)-pyrimidinedion

EMERGENCY OVERVIEW
Harmful by inhalation, in contact with skin and if swallowed.Harmful.Light sensitive.
Potential Health Effects
Eye:
May cause eye irritation.
Skin:
Causes skin irritation. Harmful if absorbed through the skin.
Ingestion:
Harmful if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
Inhalation:
Harmful if inhaled. Causes respiratory tract irritation.
Chronic:
Prolonged or repeated exposure may cause adverse reproductive effects.

Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
Get medical aid. Wash mouth out with water.
Inhalation:
Remove from exposure and move to fresh air immediately. Get medical aid.
Notes to Physician:

General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media:
Use water spray, dry chemical, or carbon dioxide.

General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal container.

Handling:
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Store protected from light. Use only in a chemical fume hood.
Storage:
Store in a cool, dry place. Store in a tightly closed container.

Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower.
Exposure Limits CAS# 51-21-8: Personal Protective Equipment Eyes: Wear chemical splash goggles.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear a chemical apron.
Respirators:
A NIOSH/MSHA approved air purifying dust or mist respirator or European Standard EN 149.

Physical State: Solid
Color: white
Odor: Not available.
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 280 - 282 deg C
Autoignition Temperature: Not available.
Flash Point: 280 deg C ( 536.00 deg F)
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: 280 deg C
Solubility in water: slightly soluble
Specific Gravity/Density:
Molecular Formula: C4H3FN2O2
Molecular Weight: 130.08

Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Light.
Incompatibilities with Other Materials:
Strong oxidizing agents.
Hazardous Decomposition Products:
Nitrogen oxides, carbon monoxide, carbon dioxide, hydrogen fluoride gas.
Hazardous Polymerization: Has not been reported.

RTECS#:
CAS# 51-21-8: YR0350000 LD50/LC50:
CAS# 51-21-8: Oral, mouse: LD50 = 115 mg/kg; Oral, rabbit: LD50 = 18900 ug/kg; Oral, rat: LD50 = 230 mg/kg.
Carcinogenicity:
5-Fluorouracil, 99% - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Dispose of in a manner consistent with federal, state, and local regulations.

IATA
Not regulated as a hazardous material.
IMO
Not regulated as a hazardous material.
RID/ADR
Not regulated as a hazardous material.

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XN
Risk Phrases:
R 20/21/22 Harmful by inhalation, in contact with
skin and if swallowed.
Safety Phrases:
S 36/37 Wear suitable protective clothing and
gloves.
WGK (Water Danger/Protection)
CAS# 51-21-8: 2
Canada
CAS# 51-21-8 is listed on Canadas NDSL List.
CAS# 51-21-8 is not listed on Canadas Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 51-21-8 is listed on the TSCA inventory.