SODIUM RHODANIDE

Sodium rhodanide is an inorganic salt that occurs as a colorless to white, deliquescent crystalline solid, highly soluble in water, alcohol, and acetone, and widely valued for its reactivity and ability to form stable complexes with transition metals.
Industrially, Sodium rhodanide is used as a solvent for polyacrylonitrile in acrylic fiber production, an intermediate in pharmaceuticals and agrochemicals, a hardening accelerator in cement, and as a reagent in analytical chemistry for the sensitive detection of iron(III) ions.
Sodium rhodanide typically occurs as a colorless to white crystalline solid that is odorless and readily melts, meaning it can absorb moisture from the air.

CAS Number: 540-72-7
EC Number: 208-754-4
Molecular Formula: NaSCN
Molecular Weight: 81.07 g/mol

Synonyms: SODIUM THIOCYANATE, 540-72-7, Sodium rhodanate, Sodium rhodanide, Sodium sulfocyanate, Thiocyanate sodium, Thiocyanic acid, sodium salt, Scyan, NaSCN, Haimased, Natrium rhodanatum, Natrium thiocyanat, Sodium thiocyanide, Sodium sulfocyanide, Natriumrhodanid, 5W0K9HKA05, DTXSID4021343, CHEBI:30952, DTXCID101343, 208-754-4, 630-465-0, sodium;thiocyanate, Thiocyanate, sodium, MFCD00011123, CHEMBL1644028, Caswell No. 796A, Natriumrhodanid [German], CNNaS, CAS-540-72-7, USAF EK-T-434, CCRIS 3967, Thiocyanate sodium [NF], EINECS 208-754-4, EPA Pesticide Chemical Code 068202, UNII-5W0K9HKA05, Thiocyanic acid sodium salt (1:1), EC 208-754-4, SCHEMBL36260, Sodium thiocyanate [WHO-DD], orb1685426, THIOCYANATE SODIUM [MI], SCHEMBL29349664, HMS5085M14, Tox21_201621, Tox21_302975, s6281, Thiocyanic acid, sodium salt (1:1), AKOS009128859, FS30601, NCGC00256614-01, NCGC00259170-01, DA-57983, HY-23119, CS-0044699, NS00075636, Sodium thiocyanate, ACS reagent, >=98.0%, Sodium thiocyanate, p.a., ACS reagent, 98%, Sodium thiocyanate, SAJ first grade, >=98.0%, Q425176, Sodium thiocyanate, >=99.99% trace metals basis, Sodium thiocyanate, JIS special grade, >=99.0%, Sodium thiocyanate, reagent grade, 98-102% (titration), Z247615468, Sodium thiocyanate, ACS reagent grade 99.99% trace metals basis, 540-72-7, Natriumthiocyanat, sodium cyanosulfanide, Sodium thiocyanate, Thiocyanate de sodium, Thiocyanic acid, sodium salt (1:1), 104345-12-2, 13249-87-1, 208-754-4, 3594965, EINECS 208-754-4, Haimased, MFCD00011123, NaSCN, Natrium thiocyanat, Natriumrhodanid, sodium and thiocyanate, sodium cyanic acid sulfo ester, Sodium isothiocyanate, sodium rhodanate, Sodium rhodanate;Sodium sulfocyanate;Sodium thiocyanate, Sodium rhodanide, SODIUM SULFOCYANATE, SODIUM SULFOCYANIDE, sodium sulphocyanate, sodium sulphocyanide, Sodium thiocyanide, sodium;thiocyanate, sodiumthiocyanate, thiocyanate sodium, Thiocyanate, sodium, Thiocyanic acid sodium salt, THIOCYANIC ACID, SODIUM SALT, 硫氰酸钠

Sodium rhodanide is the chemical compound with the formula NaSCN.
This colorless deliquescent salt is one of the main sources of the thiocyanate anion.

As such, Sodium rhodanide is used as a precursor for the synthesis of pharmaceuticals and other specialty chemicals.
Thiocyanate salts are typically prepared by the reaction of cyanide with elemental sulfur:
8 NaCN + S8 → 8 NaSCN

Sodium rhodanide crystallizes in an orthorhombic cell.
Each Na+ center is surrounded by three sulfur and three nitrogen ligands provided by the triatomic thiocyanate anion.
Sodium rhodanide is commonly used in the laboratory as a test for the presence of Fe3+ ions.

Morphological and differential thermal analysis of complexes of Sodium rhodanide with poly(ethylene oxide) have been studied.
Ionic deep eutectic solvents composed of acetamide+lithium nitrate/Sodium rhodanide have been investigated by dielectric relaxation spectroscopy.

Sodium rhodanide is an inorganic salt composed of sodium cations (Na⁺) and thiocyanate anions (SCN⁻).
Sodium rhodanide typically occurs as a colorless to white crystalline solid that is odorless and readily deliquescent, meaning it can absorb moisture from the air.

One of Sodium rhodanide's defining physical characteristics is its high solubility in water, alcohol, and acetone, making it highly versatile as an industrial chemical.
In aqueous solution, Sodium rhodanide dissociates completely into ions, and due to the ambident nature of the thiocyanate group (which can bond through either sulfur or nitrogen), it exhibits unique reactivity, especially in coordination chemistry with transition metals.
This property makes it valuable in both laboratory and industrial applications.

From an industrial perspective, Sodium rhodanide has multiple uses across diverse sectors.
In the textile and polymer industry, Sodium rhodanide is employed as a powerful solvent for polyacrylonitrile (PAN) in the production of acrylic fibers and also used as an auxiliary agent in dyeing and printing processes.
In the chemical sector, Sodium rhodanide serves as a precursor for the synthesis of herbicides, pharmaceuticals, and organic intermediates.

Sodium rhodanide is also used in the manufacture of photographic chemicals, contributing to the stabilization of silver halide emulsions.
In electroplating and metal finishing, Sodium rhodanide plays a role in plating baths and can function as a corrosion inhibitor, helping protect metal surfaces.
Additionally, in analytical chemistry, Sodium rhodanide is widely recognized for its role in the spectrophotometric determination of iron(III) ions, where it produces an intense red complex [Fe(SCN)]²⁺, making it useful for both qualitative and quantitative testing.

From a biological and pharmacological standpoint, Sodium rhodanide has had historical use as an antihypertensive agent due to its vasodilatory effects, although its use has largely been discontinued because of toxicity concerns and the development of safer alternatives.
Medically, thiocyanates are of interest because they can interfere with iodine uptake in the thyroid gland, potentially leading to hypothyroidism if exposure is excessive or chronic.
This property underscores the need for strict regulation and careful handling in occupational environments.

In terms of safety and environmental impact, Sodium rhodanide must be treated as a hazardous compound.
Exposure through inhalation, ingestion, or skin contact can lead to symptoms such as nausea, dizziness, weakness, and, in severe cases, thyroid dysfunction due to disruption of iodine metabolism.

Long-term exposure can cause systemic toxicity, and very high doses may lead to convulsions or collapse.
Environmental release is also a concern, as thiocyanates can contaminate water systems, affecting aquatic organisms.
Consequently, international safety data sheets (SDS) recommend the use of protective equipment (gloves, goggles, respirators), effective ventilation systems, and strict waste management protocols to mitigate risks.

Overall, Sodium rhodanide is a multifunctional industrial chemical with a wide spectrum of applications ranging from textiles, polymers, and dyes to pharmaceuticals, corrosion inhibition, and analytical chemistry.
Sodium rhodanide's high solubility, reactivity, and ability to form stable complexes with transition metals underpin its usefulness, while its toxicological profile necessitates careful handling and regulation.
As such, Sodium rhodanide remains a compound of both significant industrial importance and public health concern, representing the dual nature of many fluoride- and sulfur-containing chemicals: valuable in controlled use, but hazardous when mismanaged.

Market Overview of Sodium Rhodanide:
The global Sodium rhodanide market is witnessing steady growth, valued at around USD 1.2 billion in 2023 and projected to reach nearly USD 2 billion by 2032, expanding at a CAGR of about 5.5–5.8%.
This growth is largely driven by Sodium rhodanide's diverse applications: in the pharmaceutical industry as an intermediate for drug synthesis, in agriculture as a component of herbicides and fungicides, in the textile sector as a solvent for polyacrylonitrile and dyeing auxiliary, and in the construction industry as a hardening accelerator in cement and concrete.

Asia-Pacific dominates global demand, fueled by industrial expansion in China and India, while North America and Europe follow with strong pharmaceutical and specialty chemical consumption.
Market challenges include regulatory restrictions due to toxicity, raw material price fluctuations, and competition from alternative thiocyanate salts.
Despite these hurdles, Sodium rhodanide maintains a solid market presence, supported by rising demand in high-growth sectors such as pharmaceuticals, textiles, and construction materials.

Uses of Sodium Rhodanide:
Sodium rhodanide has a broad range of industrial and scientific applications due to its high solubility, reactivity, and ability to form complexes with transition metals.
In the textile industry, Sodium rhodanide is widely used as a solvent for polyacrylonitrile (PAN) in the production of acrylic fibers, as well as a dyeing and printing auxiliary that helps fix colors to fabrics.

In pharmaceuticals and fine chemicals, Sodium rhodanide serves as an intermediate in the synthesis of various drugs, biologically active compounds, and specialty chemicals.
Sodium rhodanide's role in agriculture includes use in herbicides, fungicides, and crop-protection agents, where it contributes to pest and disease control.

In the construction sector, Sodium rhodanide is added to cement and concrete as a hardening accelerator, improving strength development and reducing setting times, which is particularly valuable in cold-weather conditions.
In analytical chemistry, Sodium rhodanide is an important reagent for the spectrophotometric detection of iron(III), forming an intense blood-red complex [Fe(SCN)]²⁺ that allows sensitive colorimetric determination.

Sodium rhodanide is also used in photography as part of chemical processing baths, in electroplating solutions to improve metal coatings, and in corrosion inhibition for metal surfaces.
These wide-ranging applications demonstrate Sodium rhodanide’s versatility, bridging traditional industries such as textiles and construction with high-value sectors like pharmaceuticals, specialty chemicals, and analytical laboratories.

Sodium rhodanide is a valuable chemical raw material and has important uses in various sectors of the national economy.
Sodium rhodanide is mainly used as a solvent for spinning acrylic fibers, chemical analysis reagents, color film film rinses, certain plant defoliants, and airport road herbicides.

Sodium rhodanide is also used in pharmaceuticals, printing and dyeing, rubber processing, black nickel plating, and artificial mustard.
Oil, etc. The main industrial production processes are: separation of Sodium rhodanide from waste liquid in coke oven gas, synthesis of Sodium rhodanide with sodium cyanide and sulfur, and production of Sodium rhodanide by metathesis reaction of ammonium thiocyanate and sodium hydroxide.
The synthesis of Sodium rhodanide requires high purity HCN as raw material, which is costly and harsh.

Industry Uses:
Plasticizers
Not Known or Reasonably Ascertainable
Intermediate
Adhesives and sealant chemicals
Process regulators
Filler
Finishing agents
Processing aids not otherwise specified
Flocculating agent
Hardener
Processing aids, not otherwise listed
Surfactant (surface active agent)

Consumer Uses:
Intermediate
Not Known or Reasonably Ascertainable
Adhesives and sealant chemicals
Hardener
Process regulators
Filler
Processing aids, not otherwise listed

Benefits of Sodium Rhodanide:
Sodium rhodanide offers a range of benefits that explain its widespread industrial and scientific use.
Sodium rhodanide's high solubility in water and organic solvents makes it an excellent medium for reactions and a versatile additive across industries.

In the textile sector, Sodium rhodanide provides the benefit of dissolving polyacrylonitrile (PAN), enabling efficient production of acrylic fibers, while also enhancing dye fixation and color brightness during textile printing.
In construction, Sodium rhodanide's use as a cement and concrete accelerator shortens setting times and improves early strength development, allowing faster project completion and better performance in cold climates.

The pharmaceutical and chemical industries benefit from Sodium rhodanide’s role as a reactive intermediate in the synthesis of drugs, biologically active molecules, and specialty chemicals, expanding possibilities for innovation.
In agriculture, Sodium rhodanide contributes to crop protection formulations, supporting higher yields and more resilient food production.

Sodium rhodanide's ability to form colored complexes, particularly with iron(III), makes it invaluable in analytical chemistry, where it enables sensitive and reliable detection of trace metals.
Additionally, Sodium rhodanide enhances photographic processing and electroplating baths, providing improved image quality and more durable metal finishes.
Overall, Sodium rhodanide's benefits lie in its versatility, efficiency, and chemical reactivity, making it a cost-effective tool for multiple industries, while offering pathways to both traditional and high-technology applications.

Applications in Chemical Synthesis of Sodium Rhodanide:
Sodium rhodanide is employed to convert alkyl halides into the corresponding alkylthiocyanates.
Treatment of isopropyl bromide with Sodium rhodanide in a hot ethanolic solution affords isopropyl thiocyanate.

Protonation of Sodium rhodanide affords isothiocyanic acid, S=C=NH (pKa = −1.28).
Isothiocyanic acid, typically generated in situ from Sodium rhodanide, adds to anilines to afford 2-aminobenzothiazoles.

Related compounds of Sodium Rhodanide:
Closely related reagents include ammonium thiocyanate and potassium thiocyanate, which has twice the solubility in water.
Silver thiocyanate may be used as well; the precipitation of insoluble silver halides help simplify workup.

Chemical Properties of Sodium Rhodanide:
Sodium rhodanide, a white rhombic system crystal, is soluble in water, ethanol, acetone; Relative density is 1.735.
Sodium rhodanide melts at approx. 287℃.

Decomposes on heating and under influence of light producing toxic fumes of sulfur oxides,nitrogen oxides and cyanides.
Reacts violently with acids,strong bases and strong oxidants.

Production of Sodium Rhodanide:
Sodium rhodanide is mainly produced on an industrial scale through neutralization and by-product recovery processes.
The most common method involves the reaction of hydrogen cyanide (HCN) or alkali cyanides (such as sodium cyanide, NaCN) with elemental sulfur or sulfur dioxide, which leads to the formation of thiocyanate ions that are then stabilized as Sodium rhodanide.

Another major route is via ammonium thiocyanate production, where ammonium thiocyanate obtained from the reaction of carbon disulfide (CS₂) and ammonia is thermally decomposed, releasing gases and leaving Sodium rhodanide after treatment with sodium carbonate or sodium hydroxide.
In modern practice, large quantities of NaSCN are also obtained as a by-product in the manufacture of acrylonitrile via the ammoxidation of propylene, where waste hydrogen cyanide streams are captured and reacted with sulfur-containing agents to generate thiocyanates.

Once synthesized, the crude product is typically purified through filtration, recrystallization, and drying to obtain a free-flowing crystalline salt with purity levels that vary according to its intended application: technical grade for construction and textile uses, and higher grades (≥99%) for pharmaceuticals, laboratory reagents, and fine chemicals.
Advanced facilities integrate closed-loop systems to recover unreacted gases (HCN, CS₂) and minimize toxic waste, improving both efficiency and environmental safety.
Overall, the production of Sodium rhodanide reflects a balance between cost-effective large-scale synthesis and the need for stringent process controls due to the toxic and hazardous nature of its raw materials.

Synthesis of Sodium Rhodanide:
The synthesis of Sodium rhodanide can be achieved through several industrial and laboratory routes, all based on introducing sulfur into a cyanide-containing system to generate the thiocyanate ion (SCN⁻).

Direct Combination from Sodium Cyanide and Sulfur:
One of the most straightforward methods is the reaction of sodium cyanide (NaCN) with elemental sulfur (S) at elevated temperatures.

The process can be summarized as:
NaCN+S⟶NaSCN

This reaction is carried out under controlled heating, often in the presence of catalysts, and is suitable for bulk production, though care is required due to the extreme toxicity of cyanide.

Ammonium Thiocyanate Route:

Another common route involves first producing ammonium thiocyanate (NH₄SCN) from the reaction of carbon disulfide (CS₂) with ammonia (NH₃):
CS2+2NH3⟶NH4SCN+H2S

The ammonium thiocyanate is then treated with sodium carbonate (Na₂CO₃) or sodium hydroxide (NaOH) to displace the sodium salt:
NH4SCN+Na2CO3⟶NaSCN+NH3+CO2+H2O

This method is particularly useful for producing high-purity NaSCN, as impurities can be separated during recrystallization.

By-Product Recovery in Acrylonitrile Manufacture:
In modern large-scale practice, Sodium rhodanide is often obtained as a by-product of acrylonitrile production via ammoxidation of propylene.
In this process, hydrogen cyanide (HCN) generated as a secondary product reacts with sulfur or sulfur dioxide to form thiocyanate species.
These can be neutralized with sodium hydroxide, yielding NaSCN. This route is cost-efficient since it makes use of waste HCN streams that would otherwise pose an environmental hazard.

Purification:
After synthesis, crude Sodium rhodanide typically contains residual cyanide, sulfur, or ammonium salts.
Sodium rhodanide is therefore purified by dissolution in water, filtration, and recrystallization, followed by drying under vacuum to yield a stable, free-flowing crystalline powder.
Technical grades (95–98%) are sufficient for construction and textile uses, while ≥99% high-purity grades are required for pharmaceuticals and laboratory reagents.

History of Sodium Rhodanide:
The origins of Sodium rhodanide trace back to the early 19th century, when chemists began to explore the chemistry of cyanides and sulfur-containing compounds.
The thiocyanate ion (SCN⁻) itself was first identified in the early 1800s through reactions involving cyanide salts and elemental sulfur, leading to the discovery of compounds such as ammonium thiocyanate (NH₄SCN).

These early studies were largely carried out in Europe, where interest in cyanide chemistry was rapidly growing due to its applications in metal extraction and analytical chemistry.
Sodium rhodanide (NaSCN) was soon synthesized as part of this exploration, providing one of the first stable inorganic thiocyanate salts.

By the mid-19th century, Sodium rhodanide and related salts were being systematically studied for their ability to form vividly colored complexes with transition metals, most famously with iron(III) ions to give a deep blood-red solution.
This reaction became one of the classic qualitative tests in inorganic chemistry and remains a staple in teaching laboratories today.
During this period, NaSCN’s role in analytical chemistry gained prominence, as Sodium rhodanide allowed sensitive detection of trace amounts of iron and other metals.

In the early 20th century, Sodium rhodanide found growing industrial use, particularly in the textile sector, where it proved effective as a solvent for polyacrylonitrile (PAN), enabling the large-scale production of acrylic fibers.
This innovation transformed the textile industry by providing a cost-effective alternative to wool and other natural fibers.
Around the same time, NaSCN began to be used in photography as part of chemical baths and in electroplating solutions, contributing to improved image quality and more durable metal coatings.

During the mid-20th century, Sodium rhodanide attracted attention in the field of medicine.
Sodium rhodanide was briefly explored as an antihypertensive drug, as thiocyanates were found to lower blood pressure.

However, Sodium rhodanide's use in medicine was largely abandoned due to concerns about toxicity and thyroid effects, since thiocyanates interfere with iodine uptake and can cause goiter or hypothyroidism if consumed chronically.
This marked a turning point in Sodium rhodanide's history, highlighting both its potential benefits and its risks to human health.

In recent decades, Sodium rhodanide has continued to play an important role in specialty chemical industries.
Sodium rhodanide remains essential in textiles, agriculture (as a component of herbicides and fungicides), construction (as a cement accelerator), and analytical chemistry.
With the rise of acrylonitrile production in the petrochemical industry, NaSCN has also become an important by-product, reflecting the modern trend of integrating by-product recovery into chemical manufacturing to improve efficiency and reduce waste.

Today, Sodium rhodanide stands as a versatile compound with a rich history, having moved from 19th-century laboratory curiosity to 20th-century industrial material and 21st-century multifunctional chemical.
Sodium rhodanide's story illustrates the dual nature of many industrial chemicals: invaluable for scientific and technological progress, but requiring careful regulation and handling to minimize risks to health and the environment.

Handling and Storage of Sodium Rhodanide:
Handle Sodium rhodanide in well-ventilated areas, minimizing dust formation and avoiding inhalation or direct skin/eye contact.
Workers should not eat, drink, or smoke while handling the product.

Wash thoroughly after use.
Store in tightly sealed containers, away from heat, sparks, strong oxidizing agents, and strong acids.

Storage areas should be cool, dry, and well-ventilated, with clear labeling and restricted access.
Sodium rhodanide is hygroscopic and can absorb moisture from the air, so it must be stored in moisture-resistant packaging.
Keep separate from food, feed, and drinking water supplies.

Stability and Reactivity of Sodium Rhodanide:
Sodium rhodanide is stable under normal conditions of storage and handling.
However, at elevated temperatures it decomposes to produce toxic gases such as sulfur oxides, nitrogen oxides, and hydrogen cyanide.

Sodium rhodanide reacts with strong oxidizing agents, acids, and alkalis, which can lead to hazardous by-products.
In acidic environments, toxic hydrogen cyanide gas may be liberated.
Sodium rhodanide is also incompatible with halogens and strong reducing agents.

First Aid Measures of Sodium Rhodanide:

Inhalation:
Move the affected person to fresh air immediately.
If breathing is difficult, administer oxygen; if not breathing, perform artificial respiration.
Seek medical attention promptly.

Skin Contact:
Remove contaminated clothing and rinse skin thoroughly with soap and plenty of water for at least 15 minutes.
If irritation or burns develop, obtain medical attention.

Eye Contact:
Rinse cautiously with water for at least 15 minutes, lifting eyelids to ensure thorough flushing.
Seek immediate medical care.

Ingestion:
Rinse mouth with water. Do not induce vomiting.
Give water to drink if the victim is conscious.
Seek urgent medical help—thiocyanate ingestion can lead to systemic toxicity, affecting the thyroid and nervous system.

Firefighting Measures of Sodium Rhodanide:
Sodium rhodanide itself is not combustible, but it may decompose under fire conditions, releasing toxic fumes of cyanides, nitrogen oxides, and sulfur oxides.
Suitable extinguishing media include water spray, dry chemical, carbon dioxide, or foam.

Firefighters should wear full protective clothing and a self-contained breathing apparatus (SCBA).
Contain contaminated firewater and dispose of as hazardous waste; prevent entry into drains and waterways.

Accidental Release Measures of Sodium Rhodanide:
Evacuate personnel from the area and ensure adequate ventilation.
Avoid dust generation. Personnel must wear protective equipment including gloves, goggles, and respirators.

Spills should be carefully swept or vacuumed (with explosion-proof equipment and HEPA filter) and collected in sealed, labeled containers for disposal.
Do not wash into drains, soil, or surface waters—control runoff to prevent environmental contamination.
Wash the spill area thoroughly after cleanup.

Exposure Controls / Personal Protection of Sodium Rhodanide:

Occupational Exposure Limits:
No specific OSHA PEL or ACGIH TLV established for NaSCN, but exposure should be minimized.
Recommended limit for thiocyanates is typically 2 mg/m³ (as SCN⁻).

Engineering Controls:
Use local exhaust ventilation or fume hoods to maintain airborne concentrations below recommended limits.

Personal Protective Equipment (PPE):

Respiratory Protection:
NIOSH-approved respirator if dust/aerosols may be present.

Hand Protection:
Chemical-resistant gloves (e.g., nitrile, neoprene).

Eye Protection:
Safety goggles or face shield.

Skin/Body Protection:
Lab coat, coveralls, and closed footwear; chemical apron for large-scale handling.

Hygiene Measures:
Wash hands, forearms, and face thoroughly after handling.
Remove and wash contaminated clothing before reuse.

Identifiers of Sodium Rhodanide:
CAS Number: 540-72-7
Beilstein Reference: 3594965
ChEBI: CHEBI:30952
ChEMBL: 
ChEMBL1644028
ChEMBL84336
ChEMBL1078613
ChemSpider: 10443
ECHA InfoCard: 100.007.960
EC Number: 208-754-4
Gmelin Reference: 1249825
PubChem CID: 516871
RTECS number: XL2275000
UNII: 5W0K9HKA05
CompTox Dashboard (EPA): DTXSID4021343
InChI: InChI=1S/CHNS.Na/c2-1-3;/h3H;/q;+1/p-1
Key: VGTPCRGMBIAPIM-UHFFFAOYSA-M check
InChI=1S/CHNS.Na/c2-1-3;/h3H;/q;+1/p-1
Key: VGTPCRGMBIAPIM-REWHXWOFAB
Key: VGTPCRGMBIAPIM-UHFFFAOYSA-M
SMILES: [Na+].[S-]C#N

Linear Formula: NaSCN
CAS Number: 540-72-7
Molecular Weight: 81.07
Beilstein: 3594965
EC Number: 208-754-4
MDL number: MFCD00011123
UNSPSC Code: 12352100
PubChem Substance ID: 24870444
NACRES: NA.22

Chemical Name: Sodium rhodanide
Molecular Formula: NaSCN
Molecular Weight: 81.07 g/mol
CAS Number: 540-72-7
EC Number (EINECS): 208-754-4
UN Number (for transport): UN 3288 (Toxic solid, inorganic, n.o.s.)
RTECS Number: XW3150000
IUPAC Name: Sodium rhodanide
PubChem CID: 5187
InChI: InChI=1S/CHNS.Na/c2-1-3;/h1H;/q-1;+1
InChI Key: SFUNCZSDTORQHF-UHFFFAOYSA-M

Properties of Sodium Rhodanide:
Chemical formula: NaSCN
Molar mass: 81.072 g/mol
Appearance: deliquescent colorless crystals
Density: 1.735 g/cm3
Melting point: 287 °C (549 °F; 560 K)
Boiling point: 307 °C (585 °F; 580 K) decomposes
Solubility in water: 139 g/100 mL (21 °C)
225 g/100 mL (100 °C)
Solubility: soluble in acetone, alcohols, ammonia, SO2
Acidity (pKa): −1.28
Refractive index (nD): 1.545

Molecular Weight: 81.07 g/mol
Hydrogen Bond Donor Count: 0
Hydrogen Bond Acceptor Count: 2
Rotatable Bond Count: 0
Exact Mass: 80.96491446 Da
Monoisotopic Mass: 80.96491446 Da
Topological Polar Surface Area: 24.8 Ų
Heavy Atom Count: 4
Complexity: 34.5
Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Covalently-Bonded Unit Count: 2
Compound Is Canonicalized: Yes

Quality Level: 200
mp: 287 °C (dec.) (lit.)
SMILES string: [Na]SC#N
InChI: 1S/CHNS.Na/c2-1-3;/h3H;/q;+1/p-1
InChI key: VGTPCRGMBIAPIM-UHFFFAOYSA-M

Melting point: 287 °C (dec.) (lit.)
Density: 1.295 g/mL at 20 °C
bulk density: 800-1000kg/m3
vapor pressure: <1 hPa (20 °C)
refractive index: 1.545
storage temp.: Store at +5°C to +30°C.
solubility: H2O: 8 M at 20 °C, clear, colorless
form: Solid
color: White
PH: 6-8 (100g/l, H2O, 20℃)
Odor: Odorless
Water Solubility: 139 g/100 mL (21 ºC)
Sensitive: Hygroscopic
Merck: 14,9327
BRN: 3594965
Exposure limits: NIOSH: IDLH 25 mg/m3

Structure of Sodium Rhodanide:
Crystal structure: orthorhombic

Related compounds of Sodium Rhodanide:

Other anions:
Sodium cyanate
Sodium cyanide

Other cations:
Lithium thiocyanate
Potassium thiocyanate
Ammonium thiocyanate

Names of Sodium Rhodanide:

IUPAC name:
Sodium thiocyanate

Other names:
Sodium rhodanide
Sodium sulfocyanate
Sodium rhodanate
Thiocyanic acid, sodium salt