MSDS Number: P5763 * * * * * Effective Date: 08/10/04 * * * * * Supercedes: 10/29/01
POTASSIUM FERROCYANIDE
1. Product Identification
Synonyms: Potassium hexacyanoferrate (II), trihydrate; Tetrapotassium
ferrocyanide, trihydrate; Ferrate (4-), hexacyano, tetrapotassium,
trihydrate
CAS No.: 13943-58-3 (Anhydrous); 14459-95-1 (Trihydrate)
Molecular Weight: 422.39
Chemical Formula: K4Fe(CN)6 3H2O
Product Codes:
J.T. Baker: 3114
Mallinckrodt: 6932
2. Composition/Information on Ingredients
Ingredient CAS No Percent
Hazardous
————————————— ———— ————
———
Potassium Ferrocyanide 13943-58-3 98 – 100%
Yes
3. Hazards Identification

Emergency Overview
————————–
CAUTION! MAY BE HARMFUL IF INHALED. MAY CA– USE
IRRITATION TO SKIN, EYES, AND RESPIRATORY TRACT.
J.T. Baker SAF-T-DATA
(tm)
Ratings (Provided here for your
convenience)
——————————————————————————————
—————–
Health Rating: 1 – Slight
Flammability Rating: 0 – None
Reactivity Rating: 1 – Slight
Contact Rating: 1 – Slight
Lab Protective Equip: GOGGLES; LAB COAT
Storage Color Code: Orange (General Storage)
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Potential Health Effects
———————————-
Information on the human health effects from exposure to this substance is
limited. The sodium and potassium salts are apparently benign. They are
not decomposed to cyanide in the body.
Inhalation:
May cause irritation to the respiratory tract. Symptoms may include
coughing and shortness of breath.
Ingestion:
Large doses may cause gastrointestinal upset with nausea, vomiting,
diarrhea, and possible cramping.
Skin Contact:
May cause irritation with redness and pain.
Eye Contact:
May cause irritation, redness and pain.
Chronic Exposure:
No information found.
Aggravation of Pre-existing Conditions:
No information found.
4. First Aid Measures
Inhalation:
Remove to fresh air. Get medical attention for any breathing difficulty.
Ingestion:
Give several glasses of water to drink to dilute. If large amounts were

swallowed, get medical advice.
Skin Contact:
Immediately flush skin with plenty of water for at least 15 minutes.
Remove contaminated clothing and shoes. Wash clothing before reuse.
Thoroughly clean shoes before reuse. Get medical attention if irritation
develops.
Eye Contact:
Immediately flush eyes with plenty of water for at least 15 minutes, lifting
upper and lower eyelids occasionally. Get medical attention if irritation
persists.
5. Fire Fighting Measures
Fire:
Not considered to be a fire hazard.
Explosion:
Not considered to be an explosion hazard.
Fire Extinguishing Media:
Use any means suitable for extinguishing surrounding fire.
Special Information:
In the event of a fire, wear full protective clothing and NIOSH-approved
self-contained breathing apparatus with full facepiece operated in the
pressure demand or other positive pressure mode. May emit toxic and
flammable fumes of cyanide if involved in a fire.
6. Accidental Release Measures
Ventilate area of leak or spill. Wear appropriate personal protective
equipment as specified in Section 8. Spills: Sweep up and containerize for
reclamation or disposal. Vacuuming or wet sweeping may be used to
avoid dust dispersal.
7. Handling and Storage
Keep in a tightly closed container, stored in a cool, dry, ventilated area.
Protect against physical damage. Containers of this material may be
hazardous when empty since they retain product residues (dust, solids);
observe all warnings and precautions listed for the product.
8. Exposure Controls/Personal Protection

Airborne Exposure Limits:
None established.
Ventilation System:
In general, dilution ventilation is a satisfactory health hazard control for
this substance. However, if conditions of use create discomfort to the
worker, a local exhaust system should be considered.
Personal Respirators (NIOSH Approved):
For conditions of use where exposure to dust or mist is apparent and
engineering controls are not feasible, a particulate respirator (NIOSH type
N95 or better filters) may be worn. If oil particles (e.g. lubricants, cutting
fluids, glycerine, etc.) are present, use a NIOSH type R or P filter. For
emergencies or instances where the exposure levels are not known, use a
full-face positive-pressure, air-supplied respirator. WARNING: Air-
purifying respirators do not protect workers in oxygen-deficient
atmospheres.
Skin Protection:
Wear protective gloves and clean body-covering clothing.
Eye Protection:
Safety glasses. Maintain eye wash fountain and quick-drench facilities in
work area.
9. Physical and Chemical Properties
Appearance:
Yellow crystalline granules.
Odor:
Odorless.
Solubility:
Soluble in water.
Density:
1.85
pH:
No information found.
% Volatiles by volume @ 21C (70F):
0
Boiling Point:
Not applicable.
Melting Point:
60 – 100C (140 – 212F) Loses water
Vapor Density (Air=1):
No information found.
Vapor Pressure (mm Hg):
No information found.
Evaporation Rate (BuAc=1):
No information found.

10. Stability and Reactivity
Stability:
Stable under ordinary conditions of use and storage.
Hazardous Decomposition Products:
Emits toxic fumes of cyanide and oxides of nitrogen when heated to
decomposition.
Hazardous Polymerization:
Will not occur.
Incompatibilities:
Metal chlorates, perchlorates, nitrates, or nitrites may cause violent
explosions. May liberate toxic cyanide fumes when mixed with strong
acids.
Conditions to Avoid:
Incompatibles.
11. Toxicological Information
Anhydrous: Oral rat LD50: 6400 mg/kg. Investigated as a mutagen,
reproductive effector.
——–\Cancer Lists\———————————————–
——-
—NTP Carcinogen—
Ingredient Known Anticipated IARC
Category
———————————— —– ———– ——
——-
Potassium Ferrocyanide (13943-58-3) No No
None
12. Ecological Information
Environmental Fate:
No information found.
Environmental Toxicity:
No information found.
13. Disposal Considerations
Whatever cannot be saved for recovery or recycling should be managed in
an appropriate and approved waste disposal facility. Processing, use or
contamination of this product may change the waste management options.
State and local disposal regulations may differ from federal disposal

regulations. Dispose of container and unused contents in accordance with
federal, state and local requirements.
14. Transport Information
Not regulated.
15. Regulatory Information
——–\Chemical Inventory Status – Part 1\————————-
——–
Ingredient TSCA EC Japan
Australia
———————————————– —- — —– —
——-
Potassium Ferrocyanide (13943-58-3) Yes Yes Yes
Yes
——–\Chemical Inventory Status – Part 2\————————-
——–
–Canada–
Ingredient Korea DSL NDSL
Phil.
———————————————– —– — —- –
—-
Potassium Ferrocyanide (13943-58-3) Yes Yes No
Yes
——–\Federal, State & International Regulations – Part 1\——–
——–
-SARA 302- ——SARA
313——
Ingredient RQ TPQ List
Chemical Catg.
—————————————– — —– —- ——
——–
Potassium Ferrocyanide (13943-58-3) No No No
No
——–\Federal, State & International Regulations – Part 2\——–
——–
-RCRA- –
TSCA-
Ingredient CERCLA 261.33 8(d)
—————————————– —— —— —–

Potassium Ferrocyanide (13943-58-3) No No No
Chemical Weapons Convention: No TSCA 12(b): No CDTA: No
SARA 311/312: Acute: Yes Chronic: No Fire: No Pressure: No
Reactivity: No (Pure / Solid)

Australian Hazchem Code: None allocated.
Poison Schedule: None allocated.
WHMIS:
This MSDS has been prepared according to the hazard criteria of the
Controlled Products Regulations (CPR) and the MSDS contains all of the
information required by the CPR.
16. Other Information
NFPA Ratings: Health: 3 Flammability: 0 Reactivity: 0
Label Hazard Warning:
CAUTION! MAY BE HARMFUL IF INHALED. MAY CA– USE
IRRITATION TO SKIN, EYES, AND RESPIRATORY TRACT.
Label Precautions:
Avoid contact with eyes, skin and clothing.
Wash thoroughly after handling.
Avoid breathing dust.
Keep container closed.
Use with adequate ventilation.
Label First Aid:
If inhaled, remove to fresh air. Get medical attention for any breathing
difficulty. In case of contact, immediately flush eyes or skin with plenty of
water for at least 15 minutes. Get medical attention if irritation develops or
persists.
Product Use:
Laboratory Reagent.
Revision Information:
No Changes.
Disclaimer:
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Mallinckrodt Baker, Inc. provides the information contained herein in
good faith but makes no representation as to its comprehensiveness or
accuracy. This document is intended only as a guide to the
appropriate precautionary handling of the material by a properly
trained person using this product. Individuals receiving the
information must exercise their independent judgment in determining
its appropriateness for a particular purpose. MALLINCKRODT
BAKER, INC. MAKES NO REPRESENTATIONS OR
WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING
WITHOUT LIMITATION ANY WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE WITH RESPECT TO THE INFORMATION SET
FORTH HEREIN OR THE PRODUCT TO WHICH THE

INFORMATION REFERS. ACCORDINGLY, MALLINCKRODT
BAKER, INC. WILL NOT BE RESPONSIBLE FOR DAMAGES
RESULTING FROM — USE OF OR RELIANCE UPON THIS
INFORMATION.
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Prepared by: Environmental Health & Safety
Phone Number: (314) 654-1600 (U.S.A.)