Potassium Ferrocyanide Extra Pure

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Potassium Ferrocyanide Extra Pure is a pale yellow crystalline salt known for its stability and low toxicity in pure form. It is widely used in analytical chemistry for the detection of metal ions, particularly in the formation of Prussian blue with iron. In industrial settings, it serves roles in pigment production, electroplating, and as an anti-caking agent in salt. Despite the presence of “cyanide” in its name, it is non-toxic under normal conditions due to its tightly bound cyanide groups. This compound should be handled with care and stored in sealed containers in a cool, dry area, away from acids and oxidizing agents.

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Categories: Analytical Reagents, Inorganic and Organic Standards Tags: AnalyticalReagent, BluePigmentReagent, HighPurity, InorganicStandard, K4FeCN6, LaboratoryChemicals, LabUseOnly, MetalIonDetection, PotassiumFerrocyanide, PrecipitationAgent

Description

Potassium Ferrocyanide Extra Pure

PRIMARY USES

Analytical Reagent:
- Widely used in qualitative and quantitative chemical analysis to detect metal ions such as iron(III) (forms Prussian Blue).
- Utilized in complexometric titrations.
Pigment Production:
- Key precursor in the production of Prussian Blue pigment, used in paints, inks, and dyes.
Food Industry (under strict regulation):
- Serves as an anti-caking agent (E536) in table salt to prevent clumping.
Photographic Industry:
- Acts as a component in photographic processing chemicals and blueprint paper production (cyanotype process).

SECONDARY USES

Textile Industry:
- Used in dyeing and printing fabrics with blue and black pigments.
Electroplating:
- Functions as an additive in certain electroplating baths, especially for zinc and iron.
Heat Treatment:
- Occasionally applied in case hardening of steel to improve surface durability.

PRODUCT KEY FEATURES

1. Basic Identification Attributes

Chemical Name: Potassium Ferrocyanide
CAS Number: 14459-95-1 (common trihydrate form) / 13943-58-3 (anhydrous)
HS Code: 2837.20.00
Molecular Formula: K₄[Fe(CN)₆]·3H₂O (trihydrate)
Synonyms:
- Yellow prussiate of potash
- Potassium hexacyanoferrate(II)
- Tripotassium ferrocyanide
- Potassium ferrocyanide trihydrate

2. Physical & Chemical Properties

Physical State: Solid (crystalline powder or granules)
Color & Odor: Lemon-yellow, odorless
Boiling Point & Melting Point:
- Melting Point: ~60 °C (loses water of hydration)
- Decomposes at higher temperatures before boiling
Density/Specific Gravity: ~1.85 g/cm³
Solubility:
- Soluble in water (~33 g/100 mL at 20 °C)
- Insoluble in alcohol and ether
pH Level: ~6 to 8 (1% solution in water)
Vapor Pressure & Volatility: Non-volatile
Flash Point: Not flammable
Autoignition Temperature: Not applicable
Viscosity: Not applicable (solid)

3. Safety & Hazard Attributes

Hazard Class (GHS Classification):
- Not classified as hazardous under GHS for normal laboratory use
- Cyanide component may release toxic gases if acidified
NFPA Ratings:
- Health: 1
- Flammability: 0
- Reactivity: 2
Exposure Limits:
- No OSHA PEL or ACGIH TLV specifically assigned
Reactivity:
- Stable under normal conditions
- Releases toxic hydrogen cyanide (HCN) gas when mixed with acids

4. Storage & Handling Attributes

Storage Conditions:
- Store in tightly sealed containers in a cool, dry, well-ventilated area
- Protect from acids and moisture
Incompatible Materials:
- Acids, strong oxidizing agents
Container Type:
- Glass or plastic containers with secure lids
Shelf Life & Expiration Date:
- Stable for several years if properly stored
Special Handling Requirements:
- Avoid inhaling dust or fumes
- Use gloves, eye protection, and handle in well-ventilated area

5. Regulatory & Compliance Attributes

Regulatory Status:
- Listed in TSCA, REACH compliant
- Food additive use (as anti-caking agent E536) in small controlled quantities
Hazard Symbols (GHS Pictograms):
- None required unless acidification risk is present
Transportation Restrictions:
- Not regulated for general transport unless part of a hazardous mixture
Waste Disposal Method:
- Dispose of according to local and national environmental regulations
- Avoid releasing to the environment in large amounts

6. Environmental & Health Impact

Ecotoxicity:
- Low toxicity in neutral/basic solutions
- Toxic to aquatic life if acidified (cyanide release risk)
Persistence in Environment:
- Stable in neutral/alkaline environments
- Degrades in sunlight and acidic conditions
Carcinogenicity/Mutagenicity:
- Not classified as carcinogenic or mutagenic
Biodegradability:
- Inorganic complex; not biodegradable but relatively stable under proper conditions

SAFETY HANDLING PRECAUTIONS

SAFETY PRECAUTIONS

Personal Protective Equipment (PPE):

Wear chemical-resistant gloves (e.g., nitrile or neoprene).
Use safety goggles or a face shield.
Wear a lab coat and closed footwear.
Use only with adequate local exhaust ventilation.

Handling:

Avoid formation of dust and inhalation of particles.
Do not ingest. Avoid contact with eyes and skin.
Wash hands thoroughly after handling.

Storage:

Store in a tightly sealed container in a dry, cool, and well-ventilated area.
Keep away from strong acids—can release toxic hydrogen cyanide gas.
Protect from moisture and incompatible substances.

FIRST AID MEASURES

Inhalation:

Move to fresh air immediately.
Keep the affected person warm and at rest.
Seek medical attention if symptoms persist.

Skin Contact:

Wash thoroughly with soap and plenty of water.
Remove contaminated clothing.
Get medical attention if irritation or allergic reaction occurs.

Eye Contact:

Rinse immediately with plenty of water for at least 15 minutes.
Keep eyelids open and away from the eyeball during rinsing.
Seek medical advice if irritation develops.

Ingestion:

Rinse mouth. Do not induce vomiting.
Give water if the person is conscious.
Seek immediate medical attention.

FIRE FIGHTING MEASURES

Flammability:

Non-combustible but can decompose at high temperatures.

Extinguishing Media:

Use water spray, dry powder, carbon dioxide (CO₂), or appropriate foam for surrounding fire.

Hazardous Combustion Products:

May emit toxic fumes such as nitrogen oxides, carbon monoxide, and hydrogen cyanide when heated.

Firefighter Protection:

Wear full protective gear and self-contained breathing apparatus (SCBA).
Avoid inhalation of gases released during thermal decomposition.