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Send EmailPotassium Thiocyanate, Potassium Rhodanide, Potassium Sulfocyanate, 333-20-0
| Parameter | Description |
|---|---|
| Chemical Name | Potassium thiocyanate |
| Other Names | Potassium rhodanide, Potassium sulfocyanate, Thiocyanic acid potassium salt |
| CAS Number | 333-20-0 |
| EC Number (EINECS) | 206-370-1 |
| Chemical Formula | KSCN |
| Molecular Weight | 97.18 g/mol |
| Chemical Class | Inorganic thiocyanate salt |
| Appearance | White crystalline solid or granules |
| Odor | Odorless |
| Density | ~1.89 g/cm³ |
| Melting Point | 172 °C |
| Boiling Point | ~500 °C (decomposes) |
CHEMICAL STRUCTURE AND DESCRIPTION:
Potassium Thiocyanate (KSCN) is an inorganic salt consisting of a potassium cation (K⁺) and a thiocyanate anion (SCN⁻). The thiocyanate ion is a pseudohalide with a linear structure where a sulfur atom is bonded to a carbon atom, which is triple-bonded to a nitrogen atom (S-C≡N). It is highly soluble in water (217 g/100 mL at 20°C). It is widely used as a reagent in analytical chemistry (especially for iron determination), in photographic processing, in textile and dye industries, and in metal surface treatment and plating solutions.
Structural Features:
Potassium cation (K⁺) and thiocyanate anion (SCN⁻)
Linear pseudohalide with S-C≡N structure
Highly soluble in water
Forms colored complexes with metal ions (especially iron)
| Property | Value |
|---|---|
| Chemical Formula | KSCN |
| Molecular Weight | 97.18 g/mol |
| Appearance | White crystalline solid or granules |
| Odor | Odorless |
| Density | ~1.89 g/cm³ |
| Melting Point | 172 °C |
| Boiling Point | ~500 °C (decomposes) |
| Solubility in Water | High (~217 g/100 mL, 20°C) |
| Solubility in Alcohol | Soluble |
| Solubility in Acetone | Soluble |
| Hygroscopicity | Slightly hygroscopic |
| Solvent | Solubility |
|---|---|
| Water | High (~217 g/100 mL, 20°C) |
| Alcohol | Soluble |
| Acetone | Soluble |
| Organic Solvents | Limited solubility |
| Property | Description |
|---|---|
| Chemical Class | Inorganic thiocyanate salt |
| pH (Aqueous Solution) | ~5-8 (neutral to slightly basic) |
| Reaction with Iron(III) | Forms blood-red complex [Fe(SCN)₃] |
| Reaction with Acids | Forms thiocyanic acid (HSCN) |
| Oxidation | Reacts with oxidizers |
| Hygroscopicity | Slightly hygroscopic |
Key Reactions:
Iron Detection (Blood-red Complex):
Fe³⁺ + 3SCN⁻ → [Fe(SCN)₃] (red complex)
Acid Reaction:
KSCN + HCl → KCl + HSCN
| Sector | Application |
|---|---|
| Analytical Chemistry | Reagent for iron determination (blood-red complex formation) |
| Photography | Chemical processing |
| Textile | Dyeing and printing processes |
| Metal Surface Treatment | Plating solutions |
| Laboratory | General laboratory reagent |
| Chemical Industry | Intermediate and catalyst |
| Parameter | Specification |
|---|---|
| Purity (KSCN) | ≥ 99.0% |
| Appearance | White crystalline solid or granules |
| Solubility | Clear solution |
| Chloride (Cl) | ≤ 0.005% |
| Sulfate (SO₄) | ≤ 0.01% |
| Iron (Fe) | ≤ 0.0005% |
| Heavy Metals (as Pb) | ≤ 0.001% |
| Moisture | ≤ 0.5% |
| Parameter | Information |
|---|---|
| Storage Conditions | Cool, dry, well-ventilated area |
| Storage Temperature | 15-25°C |
| Keep Away From | Strong acids, strong oxidizers, moisture |
| Shelf Life | 24-36 months (under proper storage) |
| Packaging | Tightly closed plastic or glass containers |
| UN Number | Not classified as dangerous for transport |
Handling Notes:
Avoid dust formation and inhalation
Avoid skin and eye contact
Use in well-ventilated areas
Slightly hygroscopic; protect from moisture
| Parameter | Value |
|---|---|
| GHS Classification | GHS07 (Warning) |
| Signal Word | Warning |
| Hazard Statements | H302 (Harmful if swallowed), H315 (Skin irritation), H319 (Serious eye irritation), H335 (Respiratory tract irritation) |
| Precautionary Statements | P261, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338 |
| Toxicity | Harmful if swallowed |
| Exposure Routes | Inhalation, ingestion, skin contact |
| Symptoms | Headache, nausea, irritation |
| Target Organs | Skin, eyes, respiratory system |
| Ecotoxicity | Low to moderate aquatic toxicity |
Personal Protective Equipment:
Chemical-resistant gloves
Safety goggles
Protective clothing
Dust mask
Adequate ventilation must be provided
| Exposure Route | Action |
|---|---|
| Inhalation | Move to fresh air. If breathing difficulty occurs, administer oxygen. Seek medical attention. |
| Skin Contact | Remove contaminated clothing. Wash with plenty of water and soap. Seek medical attention. |
| Eye Contact | Rinse with plenty of water for at least 15 minutes. Seek medical attention. |
| Ingestion | Do NOT induce vomiting. Rinse mouth with water. Drink plenty of water. Seek medical attention. |
| Parameter | Information |
|---|---|
| Ecotoxicity | Low to moderate aquatic toxicity |
| Environmental Impact | Must be prevented from entering water and soil sources |
| Waste Management | Thiocyanate-containing waste must be processed at appropriate disposal facilities |
| Dosage | Avoid overuse; dosage control required |
| Parameter | Information |
|---|---|
| UN Number | Not classified as dangerous for transport |
| Hazard Class | Not classified |
| Packing Group | Not applicable |
| Proper Shipping Name | Potassium Thiocyanate |
| Marine Pollutant | No |
| ADR/RID Label | None |
| Region | Status |
|---|---|
| EU | REACH registered |
| Turkey (KKDİK) | Mandatory compliance; registration required |
| USA (TSCA) | Listed |
| EINECS | 206-370-1 |
| Customs Tariff Code | 2838.00.00 |
SUMMARY:
Potassium Thiocyanate (KSCN, CAS 333-20-0) is a white crystalline solid or granules with a molecular weight of 97.18 g/mol and density of approximately 1.89 g/cm³. It has a melting point of 172 °C and is highly soluble in water (217 g/100 mL at 20°C). It is slightly hygroscopic.
Its most important applications include use as a reagent in analytical chemistry (especially for iron determination, forming a characteristic blood-red complex), in photographic processing, in textile and dye industries, and in metal surface treatment and plating solutions.
Harmful if swallowed. May cause skin and eye irritation. Storage should be in cool, dry, well-ventilated areas, in tightly closed containers, away from strong acids and oxidizers.
Key Properties:
| Property | Value |
|---|---|
| Formula | KSCN |
| CAS No | 333-20-0 |
| Molecular Weight | 97.18 g/mol |
| Appearance | White crystalline/granules |
| Melting Point | 172 °C |
| Water Solubility | 217 g/100 mL |
| Density | ~1.89 g/cm³ |
| Primary Use | Analytical reagent |
CRITICAL WARNINGS:
Iron Detection: Potassium Thiocyanate is the most widely used reagent for the detection of iron(III) ions in analytical chemistry, forming the blood-red [Fe(SCN)₃] complex.
Acid Reaction: Contact with acids forms thiocyanic acid (HSCN). Should be kept away from acids due to potential reaction.
Hygroscopic: Slightly hygroscopic; protect from moisture. Store in tightly closed containers.
Customs Classification: The correct customs tariff code is 2838.00.00.
Regulatory Compliance: REACH, KKDİK, and TSCA registration requirements apply.
Important Disclaimer: This Technical Data Sheet (TDS) is for informational purposes only. The information provided is based on available data and is believed to be accurate. However, the user is solely responsible for determining the suitability of the product for their specific applications and for complying with all applicable regulations and safety requirements. For complete safety, handling, storage, and regulatory compliance information, always refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. All local, national, and international regulations must be followed when working with Potassium Thiocyanate.