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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
56750
Imidazole
≥99.5% (GC), flakes, powder or crystals, puriss. p.a.
Synonym(s):
1,3-Diaza-2,4-cyclopentadiene, Glyoxaline
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
100 g | Check Cart for Availability | $91.70 |
500 g | Check Cart for Availability | $209.00 |
1 kg | Check Cart for Availability | $309.00 |
About This Item
Product Name
Imidazole, puriss. p.a., ≥99.5% (GC)
vapor pressure
<1 mmHg ( 20 °C)
Quality Segment
grade
puriss. p.a.
assay
≥99.5% (GC)
form
flakes, powder or crystals
ign. residue (900 °C)
≤0.1%
pH
9.5-11.0 (25 °C, 50 mg/mL in H2O)
pKa (25 °C)
6.95
bp
256 °C (lit.)
mp
88-91 °C
solubility
alcohol: soluble(lit.), chloroform: soluble(lit.), pyridine: soluble(lit.), water: soluble(lit.)
anion traces
chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤50 mg/kg
cation traces
Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤50 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Na: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg
SMILES string
c1c[nH]cn1
InChI
1S/C3H4N2/c1-2-5-3-4-1/h1-3H,(H,4,5)
InChI key
RAXXELZNTBOGNW-UHFFFAOYSA-N
General description
Application
- For the silylation of alcohols, carboxylic acids, and amines in the presence of silyl chloride in DMF.
- In the peptide coupling using the triphenyl phosphite.
- To prepare acid chlorides from the corresponding carboxylic acids and phosgene.
It can also be used in the following reactions:
- Imidazole-PPh3/I2 catalytic system used in the conversion of alcohols into iodides
- Imidazole-PPh3/I2 is used in the diol deoxygenation reaction.
Other Notes
1 of 1
This Item | |||
|---|---|---|---|
| description puriss. p.a., ≥99.5% (GC) | description BioUltra, Molecular Biology, ≥99.5% (GC) | description ReagentPlus®, 99% | description United States Pharmacopeia (USP) Reference Standard |
| assay ≥99.5% (GC) | assay ≥99.5% (GC) | assay 99% | assay - |
| solubility pyridine: soluble(lit.), alcohol: soluble(lit.), water: soluble(lit.), chloroform: soluble(lit.) | solubility H2O: 0.1 M at 20 °C, clear, colorless | solubility - | solubility - |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level - |
| bp 256 °C (lit.) | bp 256 °C (lit.) | bp 256 °C (lit.) | bp 256 °C (lit.) |
| form powder or crystals, flakes | form powder or crystals, flakes | form crystalline | form - |
| mp 88-91 °C | mp 88-91 °C (lit.) | mp 88-91 °C (lit.) | mp 88-91 °C (lit.) |
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Signal Word
Danger
Hazard Codes
Precautionary Statements
Hazard Classifications
Acute Tox. 4 Oral - Eye Dam. 1 - Repr. 1B - Skin Corr. 1C
Storage Class
6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
Flash Point (°F)
293.0 °F - closed cup
Flash Point (°C)
145 °C - closed cup
PPE (personal protective equipment)
Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
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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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