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Merck
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Key Documents

90515

Supelco

Micro particles based on polymethacrylate

analytical standard, size: 8 μm

Synonym(s):

PMMA microbeads, 2-Propenoic acid,2-methyl homopolymer, 2-methyl-2-propenoic acid homopolymer, Microparticles based on PMAA, Microparticles based on poly(methacrylic acid), Polymethacrylate

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About This Item

MDL number:
MFCD00198073
UNSPSC Code:
41116107
NACRES:
NA.24
Pricing and availability is not currently available.

grade

analytical standard

Quality Level

100

form

particles
suspension

concentration

10% (solids)

particle size

8 μm std dev <0.15 μm, coeff var <2%

application(s)

glass & ceramic
industrial qc
pharmaceutical

format

neat

storage temp.

2-8°C

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General description

Polymethacrylate-based microparticles are a particle size standard, ideal for characterizing particle size and count to present a particle size distribution (PSD) profile of a particle system.

Application

Applicable for calibrating and validating particle size analyzers.
Also used:
  • to identify the mechanical effects of PMMA microplastics on model cell membranes[1]
  • in optical detection techniques that monitor the presence of micron-sized particles in water[2]

Features and Benefits

  • suitable for routine instrument calibration checks, testing and corrections
  • available in 5 mL and 10 mL pack sizes as neat samples

Analysis Note

The exact values for particle size and standard deviation are determined for each lot and may be found on the certificate of analysis. These values are determined with an accuracy of 0.01 μm (Coulter Multisizer). Polymethacrylate based particles have a narrow size distribution and spherical shape. They are stable at temperatures of up to 100 °C Density is 1.22 g/cm3. The surface is negatively charged. Good biocompatibility and reduced nonspecific protein binding are characteristic.

Storage Class Code

10 - Combustible liquids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
BCCM6695
BCCM4047
BCCL9478
BCCL7447
BCCL4218

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Microplastics destabilize lipid membranes by mechanical stretching
Fleury JB and Baulin VA
Proceedings of the National Academy of Sciences, 118(31) (2021)
Enhanced real-time optical detection of micron-sized particles in water using standing ultrasonic wave fields
SPIE Proc., 5994, 59940Z-59940Z (2005)

Questions

  1. How many of the 8 um particles are in 1 ml of solution for product number 90515?

    1 answer

    1. Specific number of particles per mL cannot be provided, but as a rough estimate, given that it's a 10% solution, can calculate based on 0.5 mL of particles. The average particle radius is 4 microns, resulting in an average particle volume of 268.08 um^3, or approximately 2.68e-10 cm3 (or mL). By dividing 0.5 mL by 2.68e-10, we obtain approximately 1.87e+9 particles. This calculation is based on 10% of the 5 mL solution being particles. It's important to note that this is a very rough estimation and should not be used for analytical purposes.

      Please be aware that this estimate is not guaranteed, as even a slight deviation from the 4 micron radius could significantly alter the number of particles.

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