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CAS No. :	17973-86-3
Formula :	C₄H₂Br₂N₂
M.W :	237.88
SMILES Code :	C1=CC(=NN=C1Br)Br
MDL No. :	MFCD00233947
InChI Key :	VQAFMTSSCUETHA-UHFFFAOYSA-N
Pubchem ID :	248852

GHS Pictogram:
Signal Word:	Warning
Hazard Statements:	H302-H315-H319-H335
Precautionary Statements:	P261-P305+P351+P338

Yield	Reaction Conditions	Operation in experiment
	With sodium carbonate;tetrakis(triphenylphosphine) palladium(0); In monoethylene glycol diethyl ether; water; at 80℃; for 17h;	Intermediate 2: 3-Bromo-6-(2,3-dichlorophenyl)pyridazine.To a suspension of 3,6-dibromopyridazine (5g, 21mmol) in ethylene glycol dimethyl ether (100ml) was added 2,3-dichlorophenyl boronic acid (4.03g, 21mmol), tetrakis(triphenylphosphine)palladium(0) (1.2g, 1.05mmol) and sodium carbonate (2N, aqueous) (50ml), the mixture was then heated to 800C for 17 hours whilst under argon. The dark crude reaction mixture was then evaporated to dryness. The residue was partitioned between water (200ml) and dichloromethane (300ml). The aqueous layer was separated and further extracted with dichloromethane (200ml). The combined dichloromethane layers were evaporated and the residue was purified by chromatography (90g of silica) eluting with 75% dichloromethane/ petroleum ether 40:60. The title compound was obtained as a pink coloured solid (680mg). 1H-NMR (CDCl3) ? 7.38 (IH, X, J= 8), 7.58-7.63 (2H, m), 7.70-7.76 (2H, m) LC/MS m/z [MH+] 305 consistent with molecular formula C10H581Br35Cl2N2
	With sodium carbonate;tetrakis(triphenylphosphine) palladium(0); In 1,2-dimethoxyethane; water; at 80℃; for 17h;	To a suspension of 3,6-dibromopyridazine (5g, 21mmol) in ethylene glycol dimethyl ether (100ml) was added 2,3-dichlorophenyl boronic acid (4.03g, 21mmol), tetrakis(triphenylphosphine)palladium(0) (1.2g, 1.05mmol) and sodium carbonate (2N, aqueous) (50ml), the mixture was then heated to 800C for 17 hours whilst under argon. The dark crude <n="169"/>reaction mixture was then evaporated to dryness. The residue was partitioned between water (200ml) and dichloromethane (300ml). The aqueous layer was separated and further extracted with dichloromethane (200ml). The combined dichloromethane layers were evaporated and the residue was purified by chromatography (9Og of silica) eluting with 75% dichloromethane/ petroleum ether 40:60. The title compound was obtained as a pink coloured solid (680mg). 1H-NMR (CDCl3) δ 7.38 (IH, t, /= 8), 7.58-7.63 (2H, m), 7.70-7.76 (2H, m) LC/MS m/z [MH+] 305 consistent with molecular formula Ci0H581Br35Cl2N2

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P220	Keep/Store away from clothing/combustible materials.
P221	Take any precaution to avoid mixing with combustibles
P222	Do not allow contact with air.
P223	Keep away from any possible contact with water, because of violent reaction and possible flash fire.
P230	Keep wetted
P231	Handle under inert gas.
P232	Protect from moisture.
P233	Keep container tightly closed.
P234	Keep only in original container.
P235	Keep cool
P240	Ground/bond container and receiving equipment.
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Response
Code	Phrase
P301	IF SWALLOWED:
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P321
P322
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P342	If experiencing respiratory symptoms:
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P378
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P304 + P341	IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305 + P351 + P338	IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P306 + P360	IF ON CLOTHING: Rinse Immediately contaminated CLOTHING and SKIN with plenty of water before removing clothes.
P307 + P311	IF exposed: call a POISON CENTER or doctor/physician.
P308 + P313	IF exposed or concerned: Get medical advice/attention.
P309 + P311	IF exposed or if you feel unwell: call a POISON CENTER or doctor/physician.
P332 + P313	IF SKIN irritation occurs: Get medical advice/attention.
P333 + P313	IF SKIN irritation or rash occurs: Get medical advice/attention.
P335 + P334	Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages.
P337 + P313	IF eye irritation persists: Get medical advice/attention.
P342 + P311	IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician.
P370 + P376	In case of fire: Stop leak if safe to Do so.
P370 + P378	In case of fire:
P370 + P380	In case of fire: Evacuate area.
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Storage
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P401
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P411 + P235	Keep cool.
Disposal
Code	Phrase
P501	Dispose of contents/container to ...
P502	Refer to manufacturer/supplier for information on recovery/recycling

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CAS No.: 17973-86-3

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CAS No.: 17973-86-3

Alternative Products

Product Details of 3,6-Dibromopyridazine

Safety of 3,6-Dibromopyridazine

Application In Synthesis of 3,6-Dibromopyridazine

[ 17973-86-3 ] Synthesis Path-Downstream 1~4

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Physical hazards
Code	Phrase
H200	Unstable explosive
H201	Explosive; mass explosion hazard
H202	Explosive; severe projection hazard
H203	Explosive; fire, blast or projection hazard
H204	Fire or projection hazard
H205	May mass explode in fire
H220	Extremely flammable gas
H221	Flammable gas
H222	Extremely flammable aerosol
H223	Flammable aerosol
H224	Extremely flammable liquid and vapour
H225	Highly flammable liquid and vapour
H226	Flammable liquid and vapour
H227	Combustible liquid
H228	Flammable solid
H229	Pressurized container: may burst if heated
H230	May react explosively even in the absence of air
H231	May react explosively even in the absence of air at elevated pressure and/or temperature
H240	Heating may cause an explosion
H241	Heating may cause a fire or explosion
H242	Heating may cause a fire
H250	Catches fire spontaneously if exposed to air
H251	Self-heating; may catch fire
H252	Self-heating in large quantities; may catch fire
H260	In contact with water releases flammable gases which may ignite spontaneously
H261	In contact with water releases flammable gas
H270	May cause or intensify fire; oxidizer
H271	May cause fire or explosion; strong oxidizer
H272	May intensify fire; oxidizer
H280	Contains gas under pressure; may explode if heated
H281	Contains refrigerated gas; may cause cryogenic burns or injury
H290	May be corrosive to metals
Health hazards
Code	Phrase
H300	Fatal if swallowed
H301	Toxic if swallowed
H302	Harmful if swallowed
H303	May be harmful if swallowed