What can you find here? Basic information (general, chemical) on a colorant and a grouped collection of links for your research. Also some dry pigment properties when available and safety information.
See also Single pigment art material properties

Dry pigment properties PR188

Swipe table below (only columns with available data are shown)
Avg. Particle Size Oil Absorption Density /
Specific Gravity
pH Heat
Stability
Lightfastness
Art material database
70 g oil / 100 g
External links
≈ 0.145 µm 74 ml oil / 100 g 1.47 g/cm3
≈ 0.255 µm 72 ml oil / 100 g 1.49 g/cm3
Hangzhou Epsilon
Naphthol Red HF3S
45–55 g oil / 100 g 1.44 g/cm3 6.5–7.5 200°C 7/8
Books, periodicals, papers (offline)
Pigment Red 188RM
86 g oil / 100 g
Dry pigment properties are specific to individual pigment products. Values are not representative of the pigment itself or other art products containing the pigment. Check your product data sheet for relevant values.
See also full list of available dry pigment data for particle size, oil absorption, or density / specific gravity.

Health & Safety Information

This pigment is dusty. Wear a mask when handling dry pigments.
Hazard Statements
  • Not Classified
  • Reported as not meeting GHS hazard criteria by 221 of 221 companies. For more detailed information, please visit ECHA C&L website.
Disclaimer
Data is aggregated from multiple sources prioritizing the most stringent hazard statements. Individual products may have different attributes. Always read the product's safety data sheet.

Chemical descriptors

IUPAC Name
methyl 4-[(2,5-dichlorophenyl)carbamoyl]-2-[[2-hydroxy-3-[(2-methoxyphenyl)carbamoyl]naphthalen-1-yl]diazenyl]benzoate
INCHI
InChI=1S/C33H24Cl2N4O6/c1-44-28-10-6-5-9-25(28)36-32(42)23-15-18-7-3-4-8-21(18)29(30(23)40)39-38-26-16-19(11-13-22(26)33(43)45-2)31(41)37-27-17-20(34)12-14-24(27)35/h3-17,40H,1-2H3,(H,36,42)(H,37,41)
INCHI Key
MERWBGHMSXDWBM-UHFFFAOYSA-N
Canonical Smiles
COC1=CC=CC=C1NC(=O)C2=CC3=CC=CC=C3C(=C2O)N=NC4=C(C=CC(=C4)C(=O)NC5=C(C=CC(=C5)Cl)Cl)C(=O)OC
Basic molecular Formula / primary chemistry
C33H24Cl2N4O6
Molecular Structure
Generated with RDKit.

Groups

Used together with

PW6
PY3
PR4
PG7
PR3
PR9
PW4
N/A
PW7
PR5
Click for search results with PR188 used together with other pigments in convenience mixtures (multi-pigment paints) or other art materials in our database.
Tip: You can also search for combinations by entering two or more pigment codes directly in the "Search" box.