The recommended storage temperature is -20°C; this product should be returned to the freezer after use to preserve quality. Prolonged exposure to higher temperatures can cause degradation. The melting point of this product is between 37°C and 45°C, so leaving it at room temperature will not liquefy it. To liquefy, use a controlled heat source such as a water bath set between 60°C and 80°C.
33428
4,4′-MDI
analytical standard
Synonym(s):
4,4′-Methylenebis(phenyl isocyanate), 4,4′-Diphenylmethane diisocyanate, 4,4′-Methylenediphenyl diisocyanate, 4,4′-MDI, Bis(4-isocyanatophenyl)methane
Sign In to View Organizational & Contract Pricing.
Select a Size
Change View
| Size/SKU | Availability | Price |
|---|---|---|
100 mg | Please contact Customer Service for Availability | PLN 376.00 PLN 319.60 |
About This Item
Linear Formula:
CH2(C6H4NCO)2
CAS Number:
Molecular Weight:
250.25
UNSPSC Code:
41116107
NACRES:
NA.24
PubChem Substance ID:
EC Number:
202-966-0
Beilstein/REAXYS Number:
797662
MDL number:
PLN 319.60
List PricePLN 376.00Save 15%Please contact Customer Service for Availability
grade
analytical standard
Quality Segment
shelf life
limited shelf life, expiry date on the label
technique(s)
HPLC: suitable, gas chromatography (GC): suitable
bp
200 °C/5 mmHg (lit.)
mp
42-45 °C (lit.)
density
1.18 g/mL at 25 °C (lit.)
application(s)
environmental
format
neat
storage temp.
−20°C
SMILES string
O=C=Nc1ccc(Cc2ccc(cc2)N=C=O)cc1
InChI
1S/C15H10N2O2/c18-10-16-14-5-1-12(2-6-14)9-13-3-7-15(8-4-13)17-11-19/h1-8H,9H2
InChI key
UPMLOUAZCHDJJD-UHFFFAOYSA-N
General description
This substance is listed on the positive list of the EU regulation 10/2011 for plastics intended to come into contact with food.
4,4′-MDI can be extensively used to make urethane elastomers and urethane coatings.
Application
Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.
4,4′-MDI may be used as an analytical standard for the determination of the analyte in wastewater and air samples,[1] and human biological samples by various chromatographic techniques.
1 of 1
This Item | |||
|---|---|---|---|
| technique(s) HPLC: suitable, gas chromatography (GC): suitable | technique(s) HPLC: suitable, gas chromatography (GC): suitable | technique(s) HPLC: suitable, gas chromatography (GC): suitable | technique(s) HPLC: suitable, gas chromatography (GC): suitable |
| application(s) environmental | application(s) environmental | application(s) cleaning products | application(s) environmental |
| format neat | format neat | format neat | format neat |
| Quality Level 100 | Quality Level 100 | Quality Level 100 | Quality Level 100 |
| grade analytical standard | grade analytical standard | grade analytical standard | grade analytical standard |
| storage temp. −20°C | storage temp. - | storage temp. 2-8°C | storage temp. - |
signalword
Danger
Hazard Classifications
Acute Tox. 4 Inhalation - Carc. 2 - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT RE 2 Inhalation - STOT SE 3
target_organs
Respiratory system
Storage Class
11 - Combustible Solids
wgk
WGK 1
flash_point_f
411.8 °F - closed cup
flash_point_c
211 °C - closed cup
ppe
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
Regulatory Listings
Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.
101-68-8
CAS No.
Choose from one of the most recent versions:
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
-
posso deixar o produto fora do freezer? ou sempre depois que eu terminar de utilizar tenho que colocar novamente no congelador? como faço para ele ficar liquído, apenas deixando fora do congelador ou tenho que aquece?
1 answer-
Helpful?
-
-
How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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/418/501/product-dating-information-06-25-mk.pdfHelpful?
-
-
How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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
Helpful?
-