Aplikasi Carbon nanotube (CNT) dalam metode pengobatan kanker dapat dilakukankarena menghasilkan selektivitas dan efektivitas targeting obat yang tinggi.Fungsionalisasi CNT diperlukan untuk memperbaiki dispersibilitas, solubilitas, dantoksisitas CNT. Fungsionalisasi dilakukan secara kovalen dengan oksidasi asam yangterdiri dari campuran HNO3 dan H2SO4 dengan penambahan asam klorida (HCl).Variasi yang dilakukan adalah konsentrasi HCl 6M, 8M, 10M, dan 12M pada suhu sonikasiC. CP-­f dikarakterisasi dengan uji dispersi, Fourier Infrared TransformationSpectroscopy (FTIR), Thermal Gravimetry Analysis (TGA), UV-­Vis Spectroscopy,Electron Miscroscopy-­Energy Dispersive Spectroscopy (SEM-­EDS), dan Brine ShrimpLethality Test (BSLT). Hasil penelitian menunjukkan bahwa CP-­f dengan penambahanHCl 10M (CPf-­3) menghasilkan persen solubilitas tertinggi 11,46% dan suspensi dispersiyang paling stabil pada hari ke-­51. Disamping dari peningkatan dispersibilitas dansolubilitas, morfologi sampel CPf-­3 membentuk beberapa aglomerat yang mengarahkanpada kemunculan sifat dengan nilai LC50 355,62 ppm

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Carbon nanotube application in cancer treatment methods is selected due to its high

selectivity and effectivity in drugs targeting delivery. Functionalization is needed to

improve dispersibility, solubility, and toxicity of CNT. CNT is treated covalently by

oxidation which consist of HNO3 and H2SO4 with the addition of HCl. Variation is

performed in HCl concentration of 6M, 8M, 10M, and 12M at sonication temperature of The addition of HCl in certain molarity increase the purity and dispersion time

on functionalized CNT (CP-­f). CP-­f were characterized through dispersion test, Fourier

Infrared Transformation Spectroscopy (FTIR), UV-­Vis Spectroscopy, Thermal

Gravimetry Analysis (TGA), Electron Miscroscopy-­Energy Dispersive Spectroscopy

(SEM-­EDS), and Brine Shrimp Lethality Test (BSLT)The study resulted that CP-­f with

HCl 10M addition (CPf-­3) produce the highest solubility for 11.46% and the most stable

dispersion suspension in 51 days. Besides, CPf-­3 morphology shows some agglomerates

which indicate to toxicity with LC50 of 355,62 ppm