跳转至内容
Merck
所有图片(2)

主要文件

查看所有文档

33428

Supelco

4,4′-MDI

analytical standard

别名:

4,4′-亚甲基双(异氰酸苯酯), 4,4′-二苯甲烷二异氰酸酯, 4,4′-亚甲基二苯基二异氰酸酯, 4,4′-MDI, 二苯基甲烷-4,4′-二异氰酸酯

登录查看公司和协议定价
所有图片(2)

About This Item

线性分子式:
CH2(C6H4NCO)2
CAS号:
101-68-8
分子量:
250.25
Beilstein:
797662
EC 号:
202-966-0
MDL编号:
MFCD00036131
UNSPSC代码:
41116107
PubChem化学物质编号:
329754540
NACRES:
NA.24
价格与库存信息目前不能提供

等级

analytical standard

质量水平

100

保质期

limited shelf life, expiry date on the label

技术

HPLC: suitable
gas chromatography (GC): suitable

沸点

200 °C/5 mmHg (lit.)

mp

42-45 °C (lit.)

密度

1.18 g/mL at 25 °C (lit.)

应用

environmental

包装形式

neat

储存温度

−20°C

SMILES字符串

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

正在寻找类似产品? 访问 产品对比指南

相关类别

一般描述

4,4'-MDI 可广泛用于制造聚氨酯弹性体和聚氨酯涂层。[1]
该物质被列入欧盟法规10/2011中关于拟与食品接触的塑料的积极清单。

应用

4,4′-MDI可作为分析标准品，通过各种色谱技术用于测定废水和空气样品[2][3][4] 和人类生物样本[5]中的分析物。
有关合适仪器技术的更多信息，请参考产品分析证书。如需进一步支持，请联系技术服务。

象形图

Health hazardExclamation mark
GHS08,GHS07

警示用语：

Danger

危险分类

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

靶器官

Respiratory system

储存分类代码

11 - Combustible Solids

WGK

WGK 1

闪点(°F)

411.8 °F - closed cup

闪点(°C)

211 °C - closed cup

个人防护装备

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
BCCM6182
BCCM3996
BCCF3263
BCBT8693

没有发现合适的版本？

如果您需要特殊版本，可通过批号或批次号查找具体证书。

搜索COA

已有该产品？

在文件库中查找您最近购买产品的文档。

访问文档库

Sensitive determination of airborne diisocyanates by HPLC: 4, 4?-Diphenylmethane-diisocyanate (MDI)
Schulz M and Salthammer T
Fresenius Journal of Analytical Chemistry, 362(3), 289-293 (1998)
Liquid chromatography and mass spectrometry determination of aromatic amines in hydrolysed urine from workers exposed to thermal degradation products of polyurethane
Skarping G, et al.
Chromatographia, 39(9-10), 619-623 (1994)
Hatada
Macromolecular Design of Polymeric Materials, 40 (1997)
A highly sensitive high-performance liquid chromatographic procedure for the determination of isocyanates in air
Schmidtke F and Seifert B
Fresenius Journal of Analytical Chemistry, 336(8), 647-654 (1990)
Yan Zhu et al.
Journal of chromatography. A, 956(1-2), 215-220 (2002-07-11)
A method has been developed for the simultaneous determination of a range of aromatic amines using cation-exchange chromatography performed on a standard ion chromatography column using d.c. amperometric detection. The analytes separated were 2,4- and 2,6-toluenediamine (2,4- and 2,6-TDA), aniline
查看所有相关文献

Questions

1–2 of 2 Questions  

  1. 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

      Helpful?

  2. 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

      Helpful?

Reviews

No rating value

Active Filters

我们的科学家团队拥有各种研究领域经验，包括生命科学、材料科学、化学合成、色谱、分析及许多其他领域.

联系技术服务部门