sampling Ethylene dichloride

Ethylene Dichloride

1) Description

Name: ..............................................................................................Ethylene Dichloride

Chemical Formula: .....................................................................C₂H₄Cl₂

CAS No: ..........................................................................................107-06-2

Other Names: ...............................................................................1,2-dichloroethane, Ethylene chloride, Glycol

Uses: ...............................................................................................Industrial

Physical state: ..............................................................................Liquid

Color: ..............................................................................................Colorless

Odor: ...............................................................................................Chloroform-like

Boiling Point: ................................................................................83°C (182°F)

Melting Point: ..............................................................................-17°C (-32°F)

Flash Point: ...................................................................................56°F

2) Hazards

Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F. Immediately Dangerous to Life or Health Concentrations (IDLH) NIOSH 1994

Reactivity: Strong oxidizers & caustics; chemically-active metals such as magnesium or aluminum powder, sodium & potassium; liquid ammonia [Note: Decomposes to vinyl chloride & HCl above 1112°F.]

Specific Hazards related to Sampling: EDC is flammable and is considered an occupational carcinogen by the OSHA carcinogen policy [29 CFR 1990]. Significant PPE is required when sampling and sample systems must be designed to minimize exposure risk and accidental releases into the environment.Exposures should be limited to as few employees as possible, while minimizing workplace exposure levels with engineering and work practice controls. NIOSH Recommends: The most effective control of ethylene dichloride, where feasible, is at the source of contamination by enclosure of the operation and/or local exhaust ventilation.

If feasible, the process or operation should be enclosed with a slight vacuum so that any leakage will result in the flow of external air into the enclosure. It is also important that the sample be protected from contamination from moisture.

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3) Sampling Facts

Plants need to monitor moisture content.

Water content using the Karl Fischer titration method. Samples are also run through a Gas Chromatograph (GC) to determine % concentrations.

4) Most common Sample Receptacles

EDC is sampled into plastic bottles either with a needle adapter and bottle and septum or an enclosed safety box that can be purged of fumes.