Methylene dithiocyanate Property

Melting point:

104-106 °C(lit.)

Boiling point:

285.2±23.0 °C(Predicted)

Density 

1.492 (estimate)

refractive index 

1.5300 (estimate)

Flash point:

>110°C

solubility 

very slightly in Methanol

form 

solid

color 

White to Light yellow to Light orange

Water Solubility 

Decomposes in water. Slightly soluble in organic solvents.

Stability:

Stable, but moisture sensitive. Reacts vigorously with strong bases, strong oxidizing agents. Reacts with water.

InChI

InChI=1S/C3H2N2S2/c4-1-6-3-7-2-5/h3H2

InChIKey

JWZXKXIUSSIAMR-UHFFFAOYSA-N

SMILES

C(SC#N)SC#N

CAS DataBase Reference

6317-18-6(CAS DataBase Reference)

NIST Chemistry Reference

Thiocyanic acid, methylene ester(6317-18-6)

EPA Substance Registry System

Methylene dithiocyanate (6317-18-6)

Safety

Hazard Codes 

T,N,T+

Risk Statements 

23/24/25-36/37-50-43-34-26-25

Safety Statements 

26-28-36/37/39-45-61-28A

RIDADR 

UN 2811 6.1/PG 2

WGK Germany 

3

RTECS 

XL1560000

TSCA 

Yes

HazardClass 

8

PackingGroup 

II

HS Code 

29309090

Hazardous Substances Data

6317-18-6(Hazardous Substances Data)

Toxicity

LD50 oral in rat: 55mg/kg

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H301Toxic if swalloed

H310Fatal in contact with skin

H314Causes severe skin burns and eye damage

H317May cause an allergic skin reaction

H330Fatal if inhaled

H400Very toxic to aquatic life

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P262Do not get in eyes, on skin, or on clothing.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P272Contaminated work clothing should not be allowed out of the workplace.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P320Specific treatment is urgent (see … on this label).

P391Collect spillage. Hazardous to the aquatic environment

P405Store locked up.

P501Dispose of contents/container to..…

Methylene dithiocyanate Chemical Properties,Usage,Production

Chemical Properties

Colorless needle-like crystals or yellow crystalline powder. Melting point 102-104 ℃. Soluble in dioxane, dimethylformamide, slightly soluble in other organic solvents. The solubility in room temperature water is 2300 ppm. It is very sensitive to pH, and hydrolyzes quickly above pH=8.

Uses

Methylene Dithiocyanate emulsion is used as bactericide.

Definition

ChEBI: Methylene dithiocyanate is a member of the class of thiocyanates that is methane in which two of the hycrogens have been replaced by thiocyanato groups. Used as a biocide for the control of various pathogens and algae in industrial water systems and as a fungicide for the control of surface moulds and sapstain fungi on wood. It has a role as a fungicide and an antibacterial agent.

Preparation

Synthesis of methylene dithiocyanate: under pressure, add excess sodium thiocyanate (or sodium thiocyanate) and dichloromethane into the reaction kettle, start stirring, and heat up to 80-100°C at the same time. After the reaction is completed, dichloromethane is recovered, and the solid-liquid two phases are separated to obtain a crude methylene dithiocyanate.

General Description

Methylenebis(thiocyanate) appears as yellow to light orange-colored mass or yellow powder. (NTP, 1992)

Air & Water Reactions

May be sensitive to prolonged exposure to air. Decomposes in water (not vigorously) and more rapidly in boiling water.

Reactivity Profile

Methylenedithiocyanate reacts vigorously with strong bases and strong oxidizing agents such as hydrogen peroxide. Hydrolyzes slowly with water at boiling temperatures and reacts slowly and exothermically with aqueous acids .

Fire Hazard

Flash point data for Methylenedithiocyanate are not available; however, Methylenedithiocyanate is probably combustible.

Safety Profile

Poison by ingestion, intravenous, and subcutaneous routes. When heated to decomposition it emits very toxic fumes of NOx and SOx.