This compound is a listed as a flammable solid. As a result, this product is moistened with water with a minimum moisture content of 15%. This moisture level should be maintained by keeping the container tightly sealed and the contents not allowed to dry out. Characteristics such as the flash point and autoignition temperature have not been determined. Please refer to section 9 of the SDS to review the available flammability information.
D198501
2,4-Dinitrophenol
moistened with water, ≥98.0%
Synonym(s):
α-Dinitrophenol, 2,4-DNP, DNP
Sign In to View Organizational & Contract Pricing.
Select a Size
Change View
| Size/SKU | Availability | Price |
|---|---|---|
5 g | Estimated to ship onSeptember 08, 2026fromMILWAUKEE | $31.60 |
100 g | Estimated to ship onSeptember 08, 2026fromMILWAUKEE | $40.30 |
1 kg | Estimated to ship onSeptember 08, 2026fromMILWAUKEE | $144.00 |
About This Item
Linear Formula:
(O2N)2C6H3OH
CAS Number:
Molecular Weight:
184.11
UNSPSC Code:
12352100
NACRES:
NA.22
PubChem Substance ID:
MDL number:
Beilstein/REAXYS Number:
1246142
Assay:
≥98.0%
$31.60
Estimated to ship onSeptember 08, 2026Details
Subscriptions are currently unavailable.
Ships Every 4 weeks
vapor density
6.35 (vs air)
Quality Segment
assay
≥98.0%
contains
≥15% water
mp
108-112 °C (lit.)
functional group
nitro
SMILES string
Oc1ccc(cc1[N+]([O-])=O)[N+]([O-])=O
InChI
1S/C6H4N2O5/c9-6-2-1-4(7(10)11)3-5(6)8(12)13/h1-3,9H
InChI key
UFBJCMHMOXMLKC-UHFFFAOYSA-N
Application
2,4-Dinitrophenol (DNP) can be used:
- As a reactant for catalytic reduction reactions.
- To activate carboxylic acids by converting them into dinitrophenyl (DNP) esters.
- To prepare the corresponding ester via acylation reaction using isobutyric anhydride catalyzed by hafnium triflate.
- As an effective cocatalyst to accelerate the activity and enantioselectivity of primary amine organocatalyst derived from natural primary amino acids for direct asymmetric aldol reaction.
- As an alternative activator to tetrazoles in the reaction of phosphoroamidites with nucleosides.
1 of 1
This Item | |||
|---|---|---|---|
| description moistened with water, ≥98.0% | description PESTANAL®, analytical standard | description reference material, 5000 μg/mL in methanol | description 98% |
| assay ≥98.0% | assay - | assay - | assay 98% |
| Quality Level 200 | Quality Level 100 | Quality Level 300 | Quality Level 200 |
| mp 108-112 °C (lit.) | mp 108-112 °C (lit.) | mp - | mp 189-190 °C (lit.) |
| vapor density 6.35 (vs air) | vapor density 6.35 (vs air) | vapor density - | vapor density - |
| contains ≥15% water | contains - | contains - | contains - |
| functional group nitro | functional group - | functional group - | functional group ester, nitro |
Still not finding the right product?
Explore all of our products under 2,4-Dinitrophenol
signalword
Danger
Hazard Classifications
Acute Tox. 2 Oral - Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Aquatic Acute 1 - Desen. Expl. 4 - STOT RE 1
Storage Class
4.1B - Flammable solid hazardous materials
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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.
-
Hi, I had a question regarding the product safety. Is the material supposed to stay moist, or can it safely dry out over time? Also, is there a minimum quantity at which the dry material becomes significantly hazardous in terms of flammability or dust exp
1 answer-
Helpful?
-
-
How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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.pdfHelpful?
-
-
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?
-
-
How to dissolve D198501?
1 answer-
2,4-DNP (2,4-dinitrophenylhydrazine) is sparingly soluble in water. To prepare a 0.1M solution of 2,4-DNP (e.g., 500 ml), follow the steps below:
1. Weigh 9.2 grams of 2,4-DNP and add it to 500 ml of distilled water.
2. Place the solution on a magnetic stirrer and begin stirring. Note that 2,4-DNP is insoluble in water.
3. Carefully add solid Tris Base to the solution while stirring until completely dissolved. Typically, 6-8 grams of Tris is sufficient for dissolution.
4. This process will result in a clear, yellow solution. If necessary, the solution can be filtered.Helpful?
-
-
Is there any recommended shelf-life or re-test date/period for DNP (D198501)?
1 answer-
This product is not assigned an expiration date or recommended retest date. Products with no expiration date or recommended retest date should be routinely inspected by customers to ensure they perform as expected. These products are also subject to a one-year warranty from the date of shipment.
For more information, you may access the "Product Dating Information" document under "ADDITIONAL USEFUL DOCUMENTS ABOUT OUR PRODUCTS" at the bottom of the Quality Services page with this link: https://www.sigmaaldrich.com/life-science/quality-and-regulatory-management/quality-services.
Helpful?
-