Catalog No. Size PriceQuantity
M7326-2 2mg solid $80
M7326-10 10mg solid $240


BLT-1 is a specific inhibitor of the SR-BI (Scavenger receptor, class B, type I) mediated lipid transfer. The compound inhibits both cellular selective lipid uptake of HDL cholesteryl ether and efflux of cellular cholesterol to HDL.

Product information

CAS Number: 321673-30-7

Molecular Weight: 241.40

Formula: C12H23N3S


Block lipid transport-1

Chemical Name: 2-Hexyl-1-cyclopentanone thiosemicarbazone



InChi: InChI=1S/C12H23N3S/c1-2-3-4-5-7-10-8-6-9-11(10)14-15-12(13)16/h10H,2-9H2,1H3,(H3,13,15,16)/b14-11-

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO : 41.67 mg/mL (172.62 mM; Need ultrasonic) H2O : < 0.1 mg/mL (insoluble)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

BLT-1 has IC50s of 60 and 110 nM for cellular DiI-HDL and [3H]CE-HDL uptake in ldlA[mSR-BI] cells. BLT-1 has an IC50 of 0.96 μM for the HCV entry in Huh 7.5.1 cells. BLT-1 (50 μM; 3 hours) does not induce general defects in clathrin-dependent and -independent intracellular membrane trafficking in HeLa, BSC-1 cells. BLT-1 can inhibit SR-BI-dependent selective uptake of [3H]CE from [3H]CE-HDL by mSR-BI-t1-containing liposomes in cells (IC50=0.057 µM) and liposomes (IC50=0.098 µM).


  1. Nieland TJ, et al. Discovery of chemical inhibitors of the selective transfer of lipids mediated by the HDL receptorSR-BI. Proc Natl Acad Sci U S A. 2002 Nov 26;99(24):15422-7.
  2. Nieland TJ, et al. Identification of the molecular target of small molecule inhibitors of HDL receptor SR-BI activity. Biochemistry. 2008 Jan 8;47(1):460-72.
  3. Raldúa D, et al. BLT-1, a specific inhibitor of the HDL receptor SR-BI, induces a copper-dependent phenotype during zebrafish development. Toxicol Lett. 2007 Dec 10;175(1-3):1-7. Epub 2007 Aug 22.
  4. Hirofumi Ohashi, et al. Reply to Padmanabhan and Dixit: Hepatitis C virus entry inhibitors for optimally boosting direct-acting antiviral-based treatments. Proc Natl Acad Sci U S A. 2017 Jun 6;114(23):E4527-E4529.

Products are for research use only. Not for human use.

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