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74-95-3

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Basic Information
CAS No.: 74-95-3
Name: Dibromo methane
Article Data: 81
Molecular Structure:
Molecular Structure of 74-95-3 (Dibromo methane)
Formula: CH2Br2
Molecular Weight: 173.835
Synonyms: Methylene bromide;Methylene dibromide;NSC 7293;Dibromomethane [UN2664] [Poison];Methane, dibromo-;
EINECS: 200-824-2
Density: 2.434 g/cm3
Melting Point: -52 °C
Boiling Point: 97 °C at 760 mmHg
Flash Point: 96-98 °C
Solubility: water: 0.1 g/100 mL (20 °C)
Appearance: colourless liquid
Hazard Symbols: HarmfulXn,ToxicT,FlammableF
Risk Codes: 20-52/53-39/23/24/25-23/24/25-11
Safety: 24-61-45-36/37-16-7
Transport Information: UN 2664 6.1/PG 3
PSA: 0.00000
LogP: 1.73370
Synthetic route
75-25-2

Bromoform

2857-97-8

trimethylsilyl bromide

A

18142-75-1

trimethyl-tribromomethyl-silane

B

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
With hexaethylphosphoric triamide In diethyl ether at 20℃; for 1h;A 82%
B n/a
6317-18-6

bis(thiocyanato)methane

540-72-7

sodium thiocyanide

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
Stage #1: bis(thiocyanato)methane; sodium thiocyanide In methanol; water at 74 - 75℃; for 5h;
Stage #2: With sodium hydrogencarbonate In methanol; water pH=6.3; Concentration; Solvent;
79.3%
34557-54-5

methane

A

74-83-9

methyl bromide

B

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
With bromine at 18 - 500℃; for 0.0166667h; Gas phase;A 70.6%
B 24.7%
With hydrogen bromide; oxygen; Mg/Ru/SiO2 In water at 580℃; Conversion of starting material;
With hydrogen bromide; oxygen; Ba/Bi/Ru/SiO2 In water at 580 - 600℃; Conversion of starting material;
75-09-2

dichloromethane

A

74-97-5

chlorobromomethane

B

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
With calcium bromide; tetrahexylammonium bromide at 110℃; for 24h;A 30%
B 62%
With ethyl bromide; aluminum oxide; tetrabutyl phosphonium bromide at 170℃;A 49 % Spectr.
B 25 % Spectr.
With ethyl bromide at 170℃; Product distribution; var. of catalyst, reagent;A 50 % Spectr.
B 24 % Spectr.
With ethyl bromide; aluminum oxide at 170℃;A 66 % Spectr.
B 14 % Spectr.
76508-46-8

2-ethoxy-1,3-dioxane

75-25-2

Bromoform

A

2453-03-4

trimethylene carbonate

B

74-96-4

ethyl bromide

C

53452-10-1

3-Brompropylformiat

D

75-07-0

acetaldehyde

E

3-bromopropyl ethyl carbonate

F

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
dibenzoyl peroxide at 100℃; for 2h; Rate constant; Product distribution; other temperature;A n/a
B n/a
C n/a
D n/a
E 60%
F n/a
75-25-2

Bromoform

83498-70-8

2-(hexyloxy)-1,3-dioxolane

A

96-49-1

[1,3]-dioxolan-2-one

B

111-25-1

1-bromo-hexane

C

6065-67-4

formic acid-(2-bromo-ethyl ester)

D

66-25-1

hexanal

E

2-bromoethyl hexyl carbonate

F

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
dibenzoyl peroxide at 100℃; for 2h; Rate constant; Product distribution; other temperature;A n/a
B n/a
C n/a
D n/a
E 60%
F n/a
75-77-4

chloro-trimethyl-silane

75-25-2

Bromoform

A

18142-75-1

trimethyl-tribromomethyl-silane

B

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
With hexaethylphosphoric triamide In diethyl ether at 20℃; for 1h;A 56%
B n/a
75-25-2

Bromoform

2-(hexyloxy)-m-dioxane

A

2453-03-4

trimethylene carbonate

B

111-25-1

1-bromo-hexane

C

53452-10-1

3-Brompropylformiat

D

66-25-1

hexanal

E

3-bromopropyl hexyl carbonate

F

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
dibenzoyl peroxide at 100℃; for 2h; Rate constant; Product distribution; other temperature;A n/a
B n/a
C n/a
D n/a
E 56%
F n/a
34557-54-5

methane

A

74-83-9

methyl bromide

B

75-25-2

Bromoform

C

558-13-4

carbon tetrabromide

D

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
With bromine at 500℃; Product distribution; Further Variations:; Temperatures; Bromination;A 17.4%
B 0.48%
C 2.5%
D 5%
74-83-9

methyl bromide

74-95-3

1,2-dibromomethane

Conditions
ConditionsYield
With bromine at 250℃;
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  • Dibromomethane, 99% 74-95-3

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    74-95-3

    Dibromomethane, 99% 74-95-3

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  • Dibromomethane

  • Casno:

    74-95-3

    Dibromomethane

    Min.Order: 125 Kilogram

    FOB Price:  USD $ 0.0-0.0

    ProductName:Dibromomethane Synonyms:DBM;DIBROMOMETHANE;METHYLENEDIBROMIDE;METHYLENEBROMIDE;CH2Br2;Dibrommethan;dibromo-methan;methane,dibromo … Appearance:colourless liquid Storage:Refrigerator Package:125k drums Application:Pharmaceutical I

    QINGDAO ON-BILLION INDUSTRIAL CO.,LTD was established in 2004 with registered capital RMB 26 million. (Former Qingdao on-billion imp&exp co.,ltd was founded in 1993 ) Awarded as E

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    Address:F35 Parkson Mansion No.44-60 Zhongshan Rd.

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Chemistry


IUPAC Name: Dibromomethane 
Empirical Formula: CH2Br2
Molecular Weight: 173.8346
Canonical SMILES: C(Br)Br
InChI: InChI=1S/CH2Br2/c2-1-3/h1H2
InChIKey: FJBFPHVGVWTDIP-UHFFFAOYSA-N
EINECS: 200-824-2
Product Categories: Pharmaceutical Intermediates; Organics; alpha,omega-Bifunctional Alkanes; alpha,omega-Dibromoalkanes; Monofunctional & alpha,omega-Bifunctional Alkanes; Analytical Chemistry; Standard Solution of Volatile Organic Compounds for Water & Soil Analysis; Standard Solutions (VOC); Alpha Sort; BromoVolatiles/ Semivolatiles; Chemical Class; D; DAlphabetic; DIA - DIC; Halogenated 
storage temp.: Refrigerator
Water Solubility: 0.1 g/100 mL (20 ºC) 
Stability: Stable. Incompatible with strong oxidizing agents, aluminium, magnesium. Reacts violently with potassium. 
Index of Refraction: 1.532
Molar Refractivity: 22.14 cm3
Molar Volume: 71.4 cm3
Surface Tension: 37 dyne/cm
Density: 2.434 g/cm3
Flash Point: 96-98 °C
Enthalpy of Vaporization: 32.92 kJ/mol
Boiling Point: 97 °C at 760 mmHg
Vapour Pressure: 48.7 mmHg at 25 °C
Appearance: colourless liquid
Melting Point: -52 °C
Classification Code of Dibromomethane (CAS NO.74-95-3): Mutagens; Mutation data; Noxae; TSCA Flag T [Subject to the Section 4 test rule under TSCA]

Uses

 Dibromomethane (CAS NO.74-95-3) is used as a solvent, gage fluid and in organic synthesis.

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 subcutaneous 3738mg/kg (3738mg/kg)   Toxicology and Applied Pharmacology. Vol. 4, Pg. 354, 1962.
rabbit LD50 oral 1gm/kg (1000mg/kg)   Dow Chemical Company Reports. Vol. MSD-472,
rabbit LD50 skin > 4gm/kg (4000mg/kg)   Dow Chemical Company Reports. Vol. MSD-472,
rabbit LDLo rectal 5gm/kg (5000mg/kg) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

GASTROINTESTINAL: CHANGES IN STRUCTURE OR FUNCTION OF SALIVARY GLANDS

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY STIMULATION
Journal of Pharmacology and Experimental Therapeutics. Vol. 34, Pg. 223, 1928.
rat LC50 inhalation 40gm/m3/2H (40000mg/m3)   "Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 83, 1982.
rat LD50 oral 108mg/kg (108mg/kg)   National Technical Information Service. Vol. PB85-143766

Consensus Reports

Community Right-To-Know List. Reported in EPA TSCA Inventory.

Safety Profile

Hazard Codes:  HarmfulXn,ToxicT,FlammableF
Risk Statements:  20-52/53-39/23/24/25-23/24/25-11 
R20:Harmful by inhalation. 
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R39:Danger of very serious irreversible effects. 
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed. 
R11:Highly flammable.
Safety Statements:  24-61-45-36/37-16-7 
S24:Avoid contact with skin. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37:Wear suitable protective clothing and gloves. 
S16:Keep away from sources of ignition. 
S7:Keep container tightly closed.
RIDADR:UN 2664 6.1/PG 3
WGK Germany:  2
RTECS:  PA7350000
HazardClass:  6.1
PackingGroup:  III
A poison. Moderately toxic by subcutaneous route. Mildly toxic by inhalation. Mutation data reported. Mixtures with potassium explode on light impact. When heated to decomposition it emits toxic fumes of Br.

Standards and Recommendations

DOT Classification:  6.1; Label: KEEP AWAY FROM FOOD

Specification

  Dibromomethane (CAS NO.74-95-3), its Synonyms are Methylene bromide ; Methane, dibromo- ; Methylene bromide ; Methylene dibromide .