Methylene Chloride

Description Top

CAS number	1975-09-02
UN number	1593
Chemical formula	CH₂Cl₂
Standard European Behaviour Classification (SEBC)	Sinker that dissolves (SD)
Notable risks	On combustion, forms toxic and corrosive fumes Reacts with alkalis.

GESAMP Hazard profile

A1	A2	B1	B2	C1	C2	C3	D1	D2	D3	E1	E2	E3
2	NR	1	0	1	0	0	2	2	C	NI	SD	3

Marine pollution Classification (MARPOL Annex II)

Category	Description
Y	Noxious Liquid Substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a hazard to either marine resources or human health or cause harm to amenities or other legitimate uses of the sea and therefore justify a limitation on the quality and quantity of the discharge into the marine environment.

Alternate names for this chemical

Dichloromethane
Methylene Dichloride
Methane Dichloride
Methylene Bichloride
Dcm
Methylene Chloride

Physico-chemical properties Top

Chemical formula

CH₂Cl₂

Molar mass

84.93 [g/mol]

State

Liquid at 25°C and 1 atm

Fusion temperature

-95.1 [°C]

Boiling temperature

40 [°C]

Critical temperature

510 [°C]

Density

1330 [Kg/m³] at a temperature of 20°C

Surface tension

28.33 [mN/m] at a temperature of 20°C

27.2 [mN/m] at a temperature of 25°C

Kinematic viscosity

0.32 [cSt] at a temperature of 20°C

0.31132 [cSt] at a temperature of 25°C

Hydrosolubility

20000 [mg/l] at a temperature of 20°C and salinity of 0‰

16700 [mg/l] at a temperature of 25°C and salinity of 0‰

Vapour pressure

46500 [Pa] at a temperature of 20°C

58200 [Pa] at a temperature of 25°C

Critical pressure

6100000 [Pa]

Vapour density

3.4

Lower explosivity limit (LEL)

16 [%]

Upper explosivity limit (UEL)

23 [%]

Vaporization enthalpy

330390 [J/Kg] at a temperature of 40°C

339338 [J/Kg] at a temperature of 25°C

Combustion enthalpy

6050000 [J/Kg]

Specific heat capacity

1191.6 [J/(Kg·K)]

Combustion efficiency

33 [%]

Mass flow rate of the combustion surface

0.03 [Kg/(m²·s)]

Radiative fraction

40 [%]

Henry's constant

206 [mol/(m³·Pa)]

Behaviour Top

Log Kow	1.3
Log Koc	1.4
Hydrolysis (Half-life)	Not hydrolysable
Aqueous photolysis (Half-life)	Not photolysable
Biodegradation in estuary environment (Half-life)	Not biodegradable
Biodegradation in marine environment (Half-life)	Not biodegradable
Standard European Behaviour Classification (SEBC)	Sinker that dissolves (SD)
Bioconcentration factor (BCF)	40

Ecotoxicity Top

Lowest median lethal concentration (LC₅₀) on algae

500 [mg/l]

Lowest median lethal concentration (LC₅₀) on crustacean

108.5 [mg/l]

Lowest median lethal concentration (LC₅₀) on fishes

97 [mg/l]

Highest no observed effect concentration (NOEC) on algae

550 [mg/l]

Highest no observed effect concentration (NOEC) on fishes

82.5 [mg/l]

Assessment factor (AF)

50 on the short-term

50 on the long-term

Predicted No Effect Concentration (PNEC)

1940 [µg/l] on the short-term

1650 [µg/l] on the long-term

Hazards Top

Danger

Hazards statements

Health

H351

Suspected of causing cancer.

Precautionary statements

Prevention

P201

Obtain special instructions before use.

P202

Do not handle until all safety precautions have been read and understood.

P281

Use personal protective equipment as required.

Response

P308 + P313

IF exposed or concerned: Get medical advice/attention.

Storage

P405

Store locked up.

Disposal

P501

Dispose of contents/container to ...

GESAMP Top

More information on GESAMP Hazard Evaluation Procedure

GESAMP Hazard profile

A1	A2	B1	B2	C1	C2	C3	D1	D2	D3	E1	E2	E3
2	NR	1	0	1	0	0	2	2	C	NI	SD	3

A1: Bioaccumulation

Rating	Description
2	Low potential to bioaccumulate

A1a:

Rating	Description	Criteria [mg/l]
1	Very low potential to bioaccumulate	1 ≤ Log Kow < 2

A1b:

Rating	Description	Criteria
2	Low potential to bioaccumulate	10 ≤ BCF < 100

A2: Biodegradation

Rating	Description
NR	Not readily biodegradable

B1: Acute aquatic toxicity

Rating	Description	Criteria [mg/l]
1	Practically non-toxic	100 < LC/EC/IC₅₀ ≤ 1000

B2: Chronic aquatic toxicity

Rating	Description	Criteria [mg/l]
0	Negligible	NOEC > 1

C1: Acute oral toxicity

Rating	Description	Criteria [mg/Kg]
1	Slight	300 < AOTE ≤ 2000

C2: Acute dermal toxicity (skin contact)

Rating	Description	Criteria [mg/Kg]
0	Negligible	ADTE > 2000

C3: Acute inhalation toxicity

Rating	Description	Criteria [mg/l] (4 hours exposure)
0	Negligible	AITE > 20

D1: Skin irritation or corrosion

Rating	Description	Sign	GHS category
2	Irritating	Marked erythema, Obvio	Irritant Category 2

D2: Eye irritation

Rating	Description	Sign	GHS category
2	Irritating	Marked conjunctival hy	Irritant Category 2A

D3: Long-term health effects

Notation	Hazard endpoint	Description	GHS category
C	Carcinogenicity	Chemicals which have been shown to induce or increase the incidence of cancer	Category 1 for Carcinogens

E1: Tainting of seafood

Rating	Description
NI	No Information

E2: Behaviour of chemicals in the marine environment

Rating	Description
SD	Sinker that dissolves

E3: Interference with the use of coastal amenities

Rating	Interference	Description	Interpretation	Warning
3	Highly objectionable	1 is highly acutely toxic; and/or 2 is severely irritant or corrosive to skin or eyes; and/or 3 is carcinogenic, mutagenic or reprotoxic; and/or 4 is a floater or persistent floater with associated health effects	1 C1 and/or C2 and/or C3 = 4; and/or 2 D1 or D2 = 3, 3A, 3B, or 3C; and/or 3 D3 contains C, M or R; and/or 4 E2 = F or Fp and D3 contains Ss, Sr, T, A, N, or I	Warning issued leading to the closure of amenities

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Danger

Improving Member States preparedness to face an HNS pollution of the Marine System (HNS-MS)

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Methylene Chloride

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