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Sigma-Aldrich

4,4′-Methylenebis(cyclohexyl isocyanate), mixture of isomers

90%

Synonym(s):

HMDI, Hydrogenated MDI

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About This Item

Linear Formula:
CH2(C6H10NCO)2
CAS Number:
5124-30-1
Molecular Weight:
262.35
EC Number:
225-863-2
MDL number:
MFCD00015405
UNSPSC Code:
12162002
PubChem Substance ID:
24864223
NACRES:
NA.23
Pricing and availability is not currently available.

Quality Level

200

Assay

90%

form

liquid

refractive index

n20/D 1.497 (lit.)

mp

26 °C (lit.)

density

1.066 g/mL at 25 °C (lit.)

SMILES string

O=C=NC1CCC(CC1)CC2CCC(CC2)N=C=O

InChI

1S/C15H22N2O2/c18-10-16-14-5-1-12(2-6-14)9-13-3-7-15(8-4-13)17-11-19/h12-15H,1-9H2

InChI key

KORSJDCBLAPZEQ-UHFFFAOYSA-N

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General description

4,4′-Methylenebis(cyclohexyl isocyanate), mixture of isomers (HMDI) is an aromatic diisocyanate with good mechanical properties. It is light stable and is resistant to hydrolysis. It is majorly used in the synthesis of polyurethane.[1][2]

Application

HMDI forms NCO linkages which can be used in the synthesis of polyurethanes for a variety of biomedical applications.[3][4][5]

Pictograms

Skull and crossbonesHealth hazard
GHS06,GHS08

Signal Word

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 1

Flash Point(F)

235.4 °F - closed cup

Flash Point(C)

113 °C - closed cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCT5764
MKCS9277
MKCS7690
MKCN5062
MKCK0868

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Electrospinning of L-tyrosine polyurethanes for potential biomedical applications
Shah PN, et al.
Polymer, 50(10), 2281-2289 (2009)
Effect of different isocyanates on the properties of soy-based polyurethanes
Javni I, et al.
Journal of Applied Polymer Science, 88(13), 2912-2916 (2003)
Hyperbranched polyurethane (HBPU)-urea and HBPU-imide coatings: effect of chain extender and NCO/OH ratio on their properties
Mishra AK, et al.
Progress in Organic Coatings, 74(1), 134-141 (2012)
Biodegradable non-aromatic adhesive polyurethanes based on disaccharides for medical applications
Ates B, et al.
International Journal of Adhesion and Adhesives, 49(10), 90-96 (2014)
Jeff C H Donovan et al.
Dermatitis : contact, atopic, occupational, drug, 20(4), 214-217 (2009-10-07)
Isocyanates are widely used in the manufacturing of rigid and flexible foams, fibers, and coatings such as paints, varnishes, and elastomers but are rarely reported as contact sensitizers. The aliphatic diisocyanate dicyclohexylmethane-4,4'-diisocyanate (DMDI) is known to be a strong cutaneous
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Questions

1–3 of 3 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  3. It appears that the SDS provided for this product (H-331, toxic if inhaled) might not be in line with the H-phrases presented by some industrial suppliers (H-330 fatal if inhaled). Would it be possible to check which labelling is correct?

    1 answer

    1. Thank you for calling attention to this issue. The product safety and regulatory toxicology teams have carefully reviewed this compound and verified the GHS classification for this product. The SDS has been updated to 'Acute toxicity, Inhalation (Category 2), H330'. To the best of our knowledge this would be the most current and accurate information.

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