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
444203
β-Mercaptoethanol, Molecular Biology Grade
A disulfide-reducing agent.
Synonym(s):
2-Mercaptoethanol, BME, β-Mercaptoethanol, 2-Hydroxyethylmercaptan, Thioethylene glycol
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| Pack Size | SKU | Availability | Price |
|---|
About This Item
grade
Molecular Biology
Quality Level
vapor density
2.69 (vs air)
vapor pressure
1 mmHg ( 20 °C)
description
Merck USA index - 14, 5869
assay
≥99% (GC)
form
liquid
expl. lim.
18 %
reaction suitability
reagent type: reductant
manufacturer/tradename
Calbiochem®
storage condition
OK to freeze
concentration
14.3 M (pure liquid)
refractive index
n20/D 1.500 (lit.)
pH
4.5-6 (20 °C, 500 g/L)
bp
157 °C (lit.)
mp
<-50 °C
density
1.12 g/cm3 at 20 °C, 1.114 g/mL at 25 °C (lit.)
cation traces
heavy metals (as Pb): ≤0.0001%
absorption
≤0.31 at 280 nm, ≤1.50 at 260 nm
foreign activity
DNases, proteases, RNases, none detected
shipped in
ambient
storage temp.
15-25°C
SMILES string
OCCS
InChI
1S/C2H6OS/c3-1-2-4/h3-4H,1-2H2
InChI key
DGVVWUTYPXICAM-UHFFFAOYSA-N
General description
Application
Other Notes
Legal Information
Disclaimer
1 of 1
This Item | |||
|---|---|---|---|
| grade Molecular Biology | grade Molecular Biology | grade Molecular Biology | grade certified reference material, TraceCERT® |
| assay ≥99% (GC) | assay 99% (GC/titration) | assay ≥99.0% (GC) | assay - |
| Quality Level 100 | Quality Level 200 | Quality Level 200 | Quality Level 300 |
| form liquid | form liquid | form liquid | form - |
| vapor density 2.69 (vs air) | vapor density 2.69 (vs air) | vapor density 2.69 (vs air) | vapor density 2.69 (vs air) |
| bp 157 °C (lit.) | bp 157 °C (lit.) | bp 157 °C (lit.) | bp 157 °C (lit.) |
signalword
Danger
Hazard Classifications
Acute Tox. 2 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Repr. 2 - Skin Irrit. 2 - Skin Sens. 1A - STOT RE 2 Oral
target_organs
Liver,Heart
Storage Class
6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
wgk
WGK 3
flash_point_f
165.2 °F - closed cup
flash_point_c
74 °C - closed cup
Certificates of Analysis (COA)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
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Related Content
Global Trade Item Number
| SKU | GTIN |
|---|---|
| 444203-250ML | 07790788050368 |
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How can I determine the shelf life / expiration / retest date of this product?
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What is the concentration of the solution (in w/v or M)?
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The concentration of this product is 14.3 M as a pure liquid.
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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