10,12-PENTACOSADIYNOIC ACID

Synonym(s):PCDA

10,12-Pentacosadiynoic Acid is used in the preparation of colorimetric and fluorescence sensors for cationic surfactants.

10,12-Pentacosadiynoic acid (PCDA) is an amphiphilic diacetylene that can be used:

In combination with a semifluorinated tetracosane ((CF₃(CF₂)₇(CH₂)₁₅CH₃) to synthesize mixed monolayer by photopolymerization.
For the conversion of hydrophobic upconverting nanoparticles (UCNPs) to hydrophilic.
To synthesize a polymer by combining with pyridine-2-aldoxime for colorimetric detection of malathion.
To synthesize a thermochromic sensor constituting polymer fibres with monomeric unit of two PCDA linked by a p-phenylene group (bis-PCDA-Ph).
As an inert coating material upon self-assembly and photopolymerization to modify the surface of Fe₃O₄nanoparticles.

Melting point:	62-63°C
Boiling point:	522.5±33.0 °C(Predicted)
Density	0.930±0.06 g/cm3(Predicted)
storage temp.	Keep in dark place,Inert atmosphere,Room temperature
form	powder to crystal
pka	4.78±0.10(Predicted)
color	White to Gray to Dark blue
Water Solubility	Slightly soluble in water.
Sensitive	Light Sensitive
BRN	4189973
CAS DataBase Reference	66990-32-7(CAS DataBase Reference)

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.