Skip directly to local search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options
CDC Home

Enter search terms separated by spaces.

Methylene chloride

Synonyms & Trade Names
Dichloromethane, Methylene dichloride
CAS No.
75-09-2
RTECS No.
PA8050000
DOT ID & Guide
1593 160
Formula
CH2Cl2
Conversion
1 ppm = 3.47 mg/m3
IDLH
Ca [2300 ppm]
See: 75092
Exposure Limits
NIOSH REL
: Ca See Appendix A
OSHA PEL
: [1910.1052] TWA 25 ppm ST 125 ppm
Measurement Methods

NIOSH 1005 , 3800;
OSHA 59 , 80
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a chloroform-like odor. [Note: A gas above 104°F.]
MW:
84.9
BP:
104°F
FRZ:
-139°F
Sol:
2%
VP:
350 mmHg
IP:
11.32 eV
Sp.Gr:
1.33
Fl.P:
?
UEL:
23%
LEL:
13%
Combustible Liquid
Incompatibilities & Reactivities
Strong oxidizers; caustics; chemically-active metals such as aluminum, magnesium powders, potassium & sodium; concentrated nitric acid
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin; lassitude (weakness, exhaustion), drowsiness, dizziness; numb, tingle limbs; nausea; [potential occupational carcinogen]
Target Organs
Eyes, skin, cardiovascular system, central nervous system
Cancer Site
[in animals: lung, liver, salivary & mammary gland tumors]
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
Provide: Eyewash, Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

(See Appendix E)

NIOSH

At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0058   See MEDICAL TESTS: 0148
 
Contact Us:
USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Road Atlanta, GA 30329-4027, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO