1. Metabolic Enzyme/Protease
  2. Phosphodiesterase (PDE)

IBMX (Synonyms: IMX; Isobutylmethylxanthine; Methylisobutylxanthine; NSC165960; SC2964)

Cat. No.: HY-12318 Purity: 99.93%
Handling Instructions

IBMX is a broad-spectrum phosphodiesterase (PDE) inhibitor, with IC50 of 6.5±1.2, 26.3±3.9 and 31.7±5.3 μM for PDE3, PDE4 and PDE5, respectively.

For research use only. We do not sell to patients.

IBMX Chemical Structure

IBMX Chemical Structure

CAS No. : 28822-58-4

Size Price Stock Quantity
10 mM * 1 mL in DMSO USD 66 In-stock
Stock in Sweden
Estimated Time of Arrival: December 31
50 mg USD 60 In-stock
Stock in Sweden
Estimated Time of Arrival: December 31
100 mg   Get quote  
200 mg   Get quote  

* Please select Quantity before adding items.

Customer Review

  • Biological Activity

  • Protocol

  • Technical Information

  • Purity & Documentation

  • References


IBMX is a broad-spectrum phosphodiesterase (PDE) inhibitor, with IC50 of 6.5±1.2, 26.3±3.9 and 31.7±5.3 μM for PDE3, PDE4 and PDE5, respectively.

IC50 & Target

IC50: 6.5±1.2 μM(PDE3), 26.3±3.9 μM (PDE4), 31.7±5.3 μM (PDE5)[1]

In Vitro

At 100 μM, KMUP-1 (a xanthine derivative) and IBMX are the most effective at inducing tracheal relaxation; the magnitude of the relaxation responses induced by KMUP-1 and IBMX are not significantly different[1]. IBMX (100 μM) activates renal outer medullary K+ (ROMK) channels (n=6, P<0.05) and prevents further channel activation by ANG II (n=6, P=NS) or cGMP. Of note is that pretreatment of cortical collecting duct (CCDs) isolated from high-K+ (HK)-fed rats with IBMX (100 μM) for 20 min leads to a significant increase in tubular cAMP content to 1.43±0.35 pg/mm tubule length (n=14) compare with that measured in vehicle-treated controls (0.61±0.13 pg/mm tubule length, n=12, P<0.05)[2].

In Vivo

IBMX, a non-selective PDE inhibitor significantly decreases the liver glycogen storage (mg/g, IBMX 22±1.5 P<0.001). IBMX potentiates insulin release and in hepatocytes and adipocytes, they increase glycogenolysis and lipolysis. In comparison with the control group, IBMX and mc5 significantly increase plasma glucose (blood glucose, mg/dl, control=141±3, IBMX=210±17 P<0.001 and mc5=191±13 P<0.01) while other test compounds (mc1, mc6, MCPIP and milrinone) do not produce significant effect (control=141±3, mc1 160±7, mc6 175±9, MCPIP 179±8 and milrinone 116±2 P>0.05) also mc2 does not change plasma glucose (control=141±3 and mc2=145±5). IBMX has the highest efficacy on increasing plasma glucose[3]. Treatments with IBMX and Apocynin significantly decrease cold-induced elevation of right ventricular (RV) systolic pressure (23.5±1.8 and 24.2±0.6 mmHg, respectively) although they do not decrease RV pressure to the warm control levels. IBMX or Apocynin significantly reduces medial layer thickness (19.0±0.9, and 16.9±0.8 μm, respectively) and increases lumen diameter (62.7±4.2, and 59.5±4.3 μm, respectively) of small PAs in cold-exposed rats[4].

Clinical Trial
Preparing Stock Solutions
Concentration Volume Mass 1 mg 5 mg 10 mg
1 mM 4.4996 mL 22.4982 mL 44.9964 mL
5 mM 0.8999 mL 4.4996 mL 8.9993 mL
10 mM 0.4500 mL 2.2498 mL 4.4996 mL
Please refer to the solubility information to select the appropriate solvent.
Cell Assay

IBMX is dissolved in DMSO (10 mM) and stored, and then diluted with appropriate media before use[2].

Cells are grown in 24-well plates 105 cells per well. At confluence, monolayer cells are washed with phosphate buffer solution (PBS) and then incubated with KMUP-1 (0.1-100 μM) in the presence of 100 μM IBMX for 20 min. Incubation is terminated by the addition of 10% trichloroacetic acid (TCA). Cell suspensions are sonicated and then centrifuged at 2500× g for 15 min at 4°C. To remove TCA, the supernatants are extracted three times with 5 volumes of water-saturated diethyl ether. Then, the supernatants are lyophilized and the cyclic GMP or AMP of each sample is determined by using commercially available radioimmunoassay kits[2]. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Administration

IBMX is dissolved in DMSO and diluted to desire concentration with less than 1% DMSO (Mice and Rats)[3][4].

Male mice (25-35 g) are used. For the experiment, the test compound (IBMX, milrinone, MCPIP, mc1, mc2, mc5 or mc6) or solvent (control) is injected subcutaneously to mice at 1 mg/kg dosage twice a day (8:00 a.m. and 8:00 p.m.) for 7 days. On day 8, animals are anesthetized with intraperitoneal injection of thiopental (80 mg/kg) and blood samples are obtained from their hearts and then the liver is dissected. Each sample is centrifuged for 5 min and its serum is separated. The serum and the liver of each animal are kept frozen in less than -18 oC for the following measurements.
Six groups of male Sprague-Dawley rats are used (150-180g, 6 rats/group). Three groups of rats are exposed to a climate-controlled walk-in chamber maintained at moderate cold (5.0±1°C). The remaining groups are kept in an identical chamber maintained at room temperature (23.5±1°C, warm) and served as controls. After eight weeks of exposure to cold, 3 groups in each temperature condition received continuous IV infusion of IBMX (PDE-1 inhibitor, 8.5 mg/kg/day), Apocynin (NADPH oxidase inhibitor, 25 mg/kg/day) and vehicle (DMSO, 50%), respectively. The doses of drugs have been validated for effective inhibition of PDE-1 and NADPH oxidase activity, respectively. Body weight is measured weekly. After one week of drug infusion, the animals’ right ventricular systolic blood pressure (RVBP) is measured under anesthesia. The RVP is a reliable indicator of pulmonary arterial blood pressure (PAP) and has been used by numerous investigators for evaluating PH. MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight








Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month

Room temperature in continental US; may vary elsewhere

Solvent & Solubility

DMSO: ≥ 35 mg/mL

* "<1 mg/mL" means slightly soluble or insoluble. "≥" means soluble, but saturation unknown.

Purity: 99.93%

Inquiry Online

Your information is safe with us. * Required Fields.

Product name



Applicant name *


Email address *

Phone number *


Organization name *

Country or Region *


Requested quantity *


Bulk Inquiry

Inquiry Information

Product Name:
Cat. No.: