Skip to Content
Merck

Key Documents

View All Documentation

328634

NMP

anhydrous, 99.5%

Synonym(s):

1-Methyl-2-pyrrolidone, N-Methyl-2-pyrrolidone, NMP

Sign In to View Organizational & Contract Pricing.

Select a Size

Change View

About This Item

Empirical Formula (Hill Notation):
C5H9NO
CAS Number:
872-50-4
Molecular Weight:
99.13
NACRES:
NA.21
PubChem Substance ID:
57648684
UNSPSC Code:
12352005
EC Number:
212-828-1
MDL number:
MFCD00003193
Beilstein/REAXYS Number:
106420
Assay:
99.5%
Grade:
anhydrous
Bp:
202 °C (lit.), 81-82 °C/10 mmHg (lit.)
Vapor pressure:
0.29 mmHg ( 20 °C), 0.99 mmHg ( 40 °C)
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

Product Name

1-Methyl-2-pyrrolidinone, anhydrous, 99.5%

grade

anhydrous

Quality Segment

200

vapor density

3.4 (vs air)

vapor pressure

0.29 mmHg ( 20 °C), 0.99 mmHg ( 40 °C)

assay

99.5%

form

liquid

autoignition temp.

518 °F

expl. lim.

9.5 %

impurities

<0.005% water

refractive index

n20/D 1.47 (lit.)

pH

7.7-10.0 (20 °C, 100 g/L)

bp

202 °C (lit.), 81-82 °C/10 mmHg (lit.)

mp

−24 °C (lit.)

density

1.028 g/mL at 25 °C (lit.)

SMILES string

CN1CCCC1=O

InChI

1S/C5H9NO/c1-6-4-2-3-5(6)7/h2-4H2,1H3

InChI key

SECXISVLQFMRJM-UHFFFAOYSA-N

Application

1-Methyl-2-pyrrolidinone may be used as a solvent in the following processes:
  • Preparation of 2-aryl and 2-alkyl benzothiazoles.
  • Ullmann coupling reaction of aryl halides and phenols to form Ullmann ethers in the presence of 2,2,6,6-tetramethylheptane-3,5-dione.
  • Stille cross-coupling reaction of aryl iodides with organostannanes catalyzed by Pd/C in the presence of copper iodide as cocatalyst.

Packaging

View returnable container options.

Other Notes

Pure-Pac® II containers require the Micromatic MacroValve coupler for dispensing solvents, Z560723.

Legal Information

Pure-Pac is a registered trademark of Merck KGaA, Darmstadt, Germany

Still not finding the right product?

Explore all of our products under 1-Methyl-2-pyrrolidinone

pictograms

Health hazardExclamation mark
GHS08,GHS07

signalword

Danger

Hazard Classifications

Eye Irrit. 2 - Repr. 1B - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

flash_point_f

195.8 °F - Pensky-Martens closed cup

flash_point_c

91 °C - Pensky-Martens closed cup

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Class I Designated Chemical Substances

prtr

Group 4: Flammable liquids + Type 3 petroleums + Hazardous rank III + Water soluble liquid

fsl

Substances Subject to be Indicated Names

ishl_indicated

Substances Subject to be Notified Names

ishl_notified

328634-100ML:4.548173987958E12 + 328634-2L:4.548173987965E12 + 328634-1L:4.548173987934E12 + 328634-18L:4.548173987903E12

jan

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library