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4,4'-METHYLENEBIS(PHENYL ISOCYANATE)

4,4'-METHYLENEBIS(PHENYL ISOCYANATE) structure

CAS No.: 26447-40-5

Chemical Name:: 4,4'-METHYLENEBIS(PHENYL ISOCYANATE)

Synonyms: DIPHENYLMETHANE DIISOCYANATE;BIS(4-ISOCYANATOPHENYL)METHANE;4,4'-MDI;4,4'-DIISOCYANATODIPHENYLMETHANE;METHYLENEDIPHENYLENE DIISOCYANATE;VANCHEM HM-50;VANCHEM HM-4346;JACS-26447-40-5;MDISolution,1000mg/L,1ml;Methylendiphenyldiisocyanat

CBNumber:: CB9667842

Molecular Formula:: C15H10N2O2

Molecular Weight:: 250.25

MDL Number:: MFCD00036131

MOL File:: 26447-40-5.mol

Last updated:2023-05-04 17:34:36

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4,4'-METHYLENEBIS(PHENYL ISOCYANATE) Properties

Melting point	42-45℃
Density	1.18
storage temp.	2-8°C
form	Flakes
color	White
CAS DataBase Reference	26447-40-5(CAS DataBase Reference)
Indirect Additives used in Food Contact Substances	DIPHENYLMETHANE DIISOCYANATE
FDA UNII	6152ASV70I
EPA Substance Registry System	Diphenylmethane diisocyanate (26447-40-5)

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS08,GHS07
Signal word	Danger
Hazard statements	H351-H315-H319-H317-H335-H332-H373-H334
Precautionary statements	P261-P272-P280-P302+P352-P333+P313-P321-P363-P501-P201-P202-P281-P308+P313-P405-P501-P261-P271-P304+P340-P312-P260-P314-P501-P264-P280-P302+P352-P321-P332+P313-P362-P261-P285-P304+P341-P342+P311-P501-P264-P280-P305+P351+P338-P337+P313P
Hazard Codes	Xn
Risk Statements	20-36/37/38-42/43
Safety Statements	23-36/37-45
RIDADR	UN 2811

4,4'-METHYLENEBIS(PHENYL ISOCYANATE) Chemical Properties,Uses,Production

Storage

Cool, ventilated, strictly waterproof, moisture-proof, avoid direct sunlight, and keep away from fire and heat sources. The storage temperature should not exceed 20℃ during long-term storage.

Description

Methylene diphenyl diisocyanate (MDI) is a white, odorless diisocyanate that may also occur in crystalline form. It exists in three isomers, (2,20-MDI,2,40-MDI, and 4,40-MDI), however, the primary technical/commercial form of MDI is actually polymeric MDI, which is a mixture that contains 25–80% monomeric 4,40-MDI as well as oligomers containing three to six rings and other minor isomers, such as the 2,20-isomer the 4,40 isomer. MDI is most widely used and accounted for 62% of the global market in 2000.

Uses

MDI is used to produce polyurethane foams for application in a wide range of retail, commercial, and industrial uses to protect cement, wood, fiberglass, steel, and aluminum surfaces such as truck beds, trailers, boats, foundations, and decks. MDI is also used as a high strength adhesive in industrial and consumer applications.

Definition

ChEBI: Diphenylmethane-4,4'-diisocyanate is a diisocyanate consisting of diphenylmethane with two isocyanate groups at the 4- and 4'-positions. It has a role as a hapten and an allergen. It derives from a hydride of a diphenylmethane.

Environmental Fate

MDI is the least hazardous of the commonly available isocyanates, however, it is not without toxicity. It has low vapor pressure, which reduces hazards during handling compared to the other major isocyanates, e.g., TDI, HDI. The complex nature of MDI composition and reactions in the environment often makes interpretation difficult. Release of MDI to the atmosphere is low due to its low volatility and since MDI readily degrades to inorganic compounds in the presence of hydroxyl radicals, its atmospheric half-life is short. High exposures involving MDI in ambient environments are expected to be rare. There is no information about levels of various forms of MDI in the ambient air. When MDI is released to water, it reacts readily with water to form mixtures of diisocyanates and amines, which then readily react with more MDI to produce inert, solid, insoluble polyurea. MDI has a transient existence due to its reaction with the water to produce predominantly insoluble polyureas. The evidence indicates that MDI accumulation through the aquatic food chain is extremely unlikely, as might be expected considering the very low solubility and high reactivity of MDI with hydroxyl radicals in aqueous solution.

Toxicity evaluation

A definitive mechanism of MDI toxicity is unknown; however, it is speculated that humoral and cellular immunity may be involved in the pathogenesis of hypersensitivity due to isocyanate sensitization responses of both animals and humans.

4,4'-METHYLENEBIS(PHENYL ISOCYANATE) Preparation Products And Raw materials

Raw materials

Preparation Products

4,4'-METHYLENEBIS(PHENYL ISOCYANATE) Suppliers

Global( 63)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21639	55
Hubei xin bonus chemical co. LTD	86-13657291602	linda@hubeijusheng.com	CHINA	22963	58
SUZHOU SENFEIDA CHEMICAL CO.,LTD	+86-0512-83500002 +8615195660023	sales@senfeida.com	China	23046	58
Shanghai Jinhuan Chemical CO.,LTD.	+86-21-52210535 +8613162045318	sales@jinhchem.com	China	331	58
Mainchem Co., Ltd.	+86-0592-6210733	sale@mainchem.com	China	32343	55
Shaanxi Didu New Materials Co. Ltd	+86-89586680 +86-13289823923	1026@dideu.com	China	8670	58
Shanghai Hanhong Scientific Co.,Ltd.	021-54306202 13764082696	info@hanhongsci.com	China	42958	64
Syntechem Co.,Ltd		info@syntechem.com	China	12984	57
Chengdu Ai Keda Chemical Technology Co., Ltd.	4008-755-333 18080918076	800078821@qq.com	China	9718	55
Chengdu HuaXia Chemical Reagent Co. Ltd	400-1166-196 13458535857	cdhxsj@163.com	China	13350	58

Supplier	Advantage
Henan Tianfu Chemical Co.,Ltd.	55
Hubei xin bonus chemical co. LTD	58
SUZHOU SENFEIDA CHEMICAL CO.,LTD	58
Shanghai Jinhuan Chemical CO.,LTD.	58
Mainchem Co., Ltd.	55
Shaanxi Didu New Materials Co. Ltd	58
Shanghai Hanhong Scientific Co.,Ltd.	64
Syntechem Co.,Ltd	57
Chengdu Ai Keda Chemical Technology Co., Ltd.	55
Chengdu HuaXia Chemical Reagent Co. Ltd	58

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