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
A2251
Acetyl-β-methylcholine chloride
≥98% (TLC), powder
Synonym(s):
(2-Acetoxypropyl)trimethylammonium chloride, Methacholine chloride
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| Pack Size | SKU | Availability | Price |
|---|
About This Item
Quality Level
assay
≥98% (TLC)
form
powder
mp
171-173 °C (lit.)
solubility
H2O: 50 mg/mL (solutions undergo rapid, pH-dependent decomposition at pH > 6.)
storage temp.
−20°C
SMILES string
[Cl-].CC(C[N+](C)(C)C)OC(C)=O
InChI
1S/C8H18NO2.ClH/c1-7(11-8(2)10)6-9(3,4)5;/h7H,6H2,1-5H3;1H/q+1;/p-1
InChI key
JHPHVAVFUYTVCL-UHFFFAOYSA-M
Gene Information
human ... CHRM1(1128), CHRM2(1129), CHRM3(1131), CHRM4(1132), CHRM5(1133)
Application
Biochem/physiol Actions
1 of 1
This Item | |||
|---|---|---|---|
| Quality Level 100 | Quality Level 200 | Quality Level 200 | Quality Level 200 |
| assay ≥98% (TLC) | assay ≥99% (TLC) | assay ≥99.0% (AT) | assay ≥99.0% (AT) |
| solubility H2O: 50 mg/mL (solutions undergo rapid, pH-dependent decomposition at pH > 6.) | solubility water: 100 mg/mL, clear to slightly hazy, colorless | solubility H2O: 1 M, clear, colorless | solubility H2O: 1 M, clear, colorless |
| form powder | form powder | form powder or crystals | form powder or crystals |
| mp 171-173 °C (lit.) | mp - | mp 302-305 °C (dec.) (lit.) | mp 302-305 °C (dec.) (lit.) |
| Gene Information human ... CHRM1(1128), CHRM2(1129), CHRM3(1131), CHRM4(1132), CHRM5(1133) | Gene Information human ... ACHE(43) | Gene Information - | Gene Information - |
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signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Storage Class
11 - Combustible Solids
wgk
WGK 3
ppe
dust mask type N95 (US), Eyeshields, Gloves
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Global Trade Item Number
| SKU | GTIN |
|---|---|
| A2251-100G | 04061835505869 |
| A2251-25G | 04061835541980 |
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How can I determine the shelf life / expiration / retest date of this product?
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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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