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.pdf
277258
2-Methylbutane
anhydrous, ≥99%
Synonym(s):
Isopentane
Select a Size
About This Item
Skip To
Product Name
2-Methylbutane, anhydrous, ≥99%
InChI key
QWTDNUCVQCZILF-UHFFFAOYSA-N
InChI
1S/C5H12/c1-4-5(2)3/h5H,4H2,1-3H3
SMILES string
CCC(C)C
grade
anhydrous
vapor density
2.6 (vs air)
vapor pressure
11.17 psi ( 20 °C)
assay
≥99%
form
liquid
autoignition temp.
788 °F
expl. lim.
8.3 %
impurities
<0.001% water
<0.005% water (100 mL pkg)
evapn. residue
<0.0003%
refractive index
n20/D 1.354 (lit.)
bp
30 °C (lit.)
mp
-160 °C
density
0.62 g/mL at 25 °C (lit.)
storage temp.
2-8°C
Quality Level
Looking for similar products? Visit Product Comparison Guide
Related Categories
1 of 4
This Item | 320404 | 270342 | 59060 |
|---|---|---|---|
| grade anhydrous | grade - | grade - | grade analytical standard |
| assay ≥99% | assay ≥99% | assay ≥99.5% | assay ≥99.7% (GC) |
| Quality Level 100 | Quality Level 100 | Quality Level 100 | Quality Level 100 |
| form liquid | form liquid | form liquid | form - |
| autoignition temp. 788 °F | autoignition temp. 788 °F | autoignition temp. 788 °F | autoignition temp. 788 °F |
| mp -160 °C | mp -160 °C | mp -160 °C | mp - |
Application
signalword
Danger
hcodes
Hazard Classifications
Aquatic Chronic 2 - Asp. Tox. 1 - Flam. Liq. 1 - STOT SE 3
target_organs
Central nervous system
supp_hazards
Storage Class
3 - Flammable liquids
wgk
WGK 2
flash_point_f
-59.8 °F - closed cup
flash_point_c
-51 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves
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.
-
How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
-
-
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?
-
Active Filters
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.
Contact Technical Service