[(2-Chlorophenyl)Methylene]Malononitrile , ≥98% , 2698-41-1

CAS NO.：2698-41-1

Empirical Formula: C10H5ClN2

Molecular Weight: 188.61

MDL number: MFCD00019784

EINECS: 220-278-9

PRODUCT Properties

• Melting point: 68-70 °C(lit.)
• Boiling point: 126 °C0.1 mm Hg(lit.)
• Density: 1.2906 (rough estimate)
• vapor pressure: 3 x 10^-5 mmHg at 20 °C (NIOSH, 1997)
• refractive index: 1.5500 (estimate)
• storage temp.: 2-8°C
• solubility: Soluble in acetone, benzene, 1,4-dioxane, ethyl acetate, and methylene chloride (Windholz et al., 1983)
• form: White, crystalline solid
• color: White crystalline solid with a pepper-like odor
• Water Solubility: 0.1-0.5 g/100 mL at 16 ºC
• Exposure limits: NIOSH REL: ceiling 0.05 ppm (0.4 mg/m³), IDLH 2 mg/m³; OSHA PEL: TWA 0.05 ppm; ACGIH TLV: ceiling 0.05 ppm (adopted).
• Stability: Stable. Incompatible with strong oxidizing agents. Combustible.
• CAS DataBase Reference: 2698-41-1(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Chlorobenzalmalononitrile(2698-41-1)
• EPA Substance Registry System: o-Chlorobenzylidene malononitrile (2698-41-1)

Description and Uses

CS, also known as o-chlorobenzylidene malononitrile, is a riot control agent (RCA) currently used by U.S. military forces. It was synthesized in 1928 and named 'CS' after its creators, Corson and Stoughton. CS replaced chloroacetophenone (CN) in 1959 as the primary RCA due to its higher safety ratio. It is more potent and safer than CN. CS can be disseminated pyrotechnically or in powder formulations like CS1 and CS2.

2-Chlorobenzylidenemalononitrile has found extensive application in exploring the effects of irritants on the human body. It is used as a tear gas and riot control agent.

Safety

• Symbol(GHS): GHS07,GHS09,GHS06
• Signal word: Danger
• Hazard statements: H319-H400-H301-H317-H335-H315-H330
• Precautionary statements: P261-P272-P280-P302+P352-P333+P313-P321-P363-P501-P273-P391-P501-P260-P271-P284-P304+P340-P310-P320-P403+P233-P405-P501-P264-P280-P302+P352-P321-P332+P313-P362-P264-P280-P305+P351+P338-P337+P313P-P264-P270-P301+P310-P321-P330-P405-P501
• Hazard Codes: Xi,T
• Risk Statements: 36/37/38-42/43-25
• Safety Statements: 26-27-37/39-45-36/37/39
• RIDADR: UN 3448 6.1/PG 2
• OEL: Ceiling: 0.05 ppm (0.4 mg/m3) [skin]
• WGK Germany: 3
• RTECS: OO3675000
• HazardClass: 6.1(a)
• PackingGroup: I
• Hazardous Substances Data: 2698-41-1(Hazardous Substances Data)
• Toxicity: LD50 in rats (mg/kg): 28 i.v., 48 i.p.; LC50 in rats: 88,480 mg/min/m3 (Ballantyne, Swanston)
• IDLA: 2 mg/m3