Pion’s SiriusT3 is a fully automated instrument designed for compound screening and preparing detailed PhysChem profiles. It gives you accurate data using only small sample quantities and can manage up to 8 solubility assays per day.
The SiriusT3 is an essential tool for analyzing APIs or NCEs and their salts. It measures pKa, logP, logD and solubility of ionizable drugs and small molecules, needing only very small amounts of sample. It is widely used in industrial and university labs, CROs and Pharma to support drug discovery research.
The SiriusT3 can be used for a range of tasks across early stage compound screening, physchem char-acterization and pre-formulation. These include:
The SiriusT3 makes measurements using minute amounts of sample. Assays are performed in solu-tion, 1 - 3 mL. Solutions are prepared in vials via automated dispensers and temperature-controlled between 12 - 70°C. You can weigh powdered samples directly into sample vials. Alternatively, you can prepare stock solutions (e.g. 10 mM in DMSO) and pipette into vials. A built-in ultra-sonic bath helps to dissolve poorly soluble compounds. In addition, by running clean-up assays, you can ensure that the SiriusT3 is always ‘ready to go’.
With the SiriusT3, you can determine pKa values to high accuracy, with results in 15 minutes by Fast UV for most samples. It uses the UV-metric method for pKas below 2 and above 12; cosolvent meth-ods for poorly soluble samples; pH-metric assays for samples without pH/UV activity. Sample re-quirement: UV, 10 μg; pH-metric, 1 mg.
The SiriusT3 has a fully automated X and Y axis on a titrator module, allowing you to run complicated assays that would be challenging to set up manually.
The optional autoloader allows for convenience and high throughput by enabling you to run unat-tended experiments. Supports multiple samples, multiple methods, or both.
With the SiriusT3, you have the option to integrate Assay Expert software from ACD Labs to optimize the design of experiments. This software enables you to analyze structure and identify ionizable groups, to indicate whether they are acidic or basic and to estimate pKa and logP values – all of which can inform the design of your experiment.
Many assays work with standard templates. Templates are supplied for all supported assays, including a 1-2-3 template for setting up cosolvent pKa assays. You can also save customized templates if re-quired.
The Pion pH-metric method provides independent confirmation that ionization has occurred and also helps characterize acidic and basic groups. This eliminates the need for time-consuming shake-flask style experiments in multiple pH buffers. You can use it to determine logP and logD vs. pH and to study partition between water and octanol, toluene, dodecane and with other solvents. There are also built-in methods for high, medium and low logP. Sample requirement: 1 - 2 mg.
SiriusT3 Product Brochure
Extended Instrument Shut Down for Sirius Storage Guidelines
Diclofenac Prodrugs for Intra-articular Depot Injectables: In Vitro Hydrolysis and Species Variation
Comparison of Cinchona Catalysts Containing Ethyl or Vinyl or Ethynyl Group at Their Quinuclidine Ring
pKa and physchem property measurements for the pharmaceutical industry
WEBINAR: How pKa Values are used in the Pharmaceutical Industry
WEBINAR: Understanding and Measuring pKa
LogP as a tool in intramolecular hydrogen bond considerations
Effect of vinylpyrrolidone polymers on the solubility and supersaturation of drugs; a study using the Cheqsol method
Acid‐base titrations of proteins in small volumes
The impact of cosolvent on measured log P values
Determination of hydrogen bonding properties using logP
Surface tension and supersaturation
Measuring the isoelectric point of peptides by potentiometric titration
Measuring Physiochemical Properties
WEBINAR: Measuring solubility - what’s best for you?
WEBINAR: Physicochemical Properties and their relation to ADMET
WEBINAR: How Cheqsol Works
WEBINAR: Investigating Supersaturation and Solubility Enhancement
WEBINAR: State of the art UV methods for measuring pKa
WEBINAR: Accessing hydrogen bond parameters and their application in drug discovery
WEBINAR: Log P- History, Measurement and Applications in Drug Development
Early pharmaceutical profiling to predict oral drug absorption: Current status and unmet needs
Novel N-methylsulfonamide and Retro-N-methylsulfonamide Derivatives as 17b-Hydroxysteroid Dehydrogenase Type 2 (17b-HSD2) Inhibitors with Good ADME-Related Physicochemical Parameters
Partial Protection Against Multiple RT-SHIV162P3 Vaginal Challenge of Rhesus Macaques by a Silicone Elastomer Vaginal Ring Releasing the NNRTI MC1220
Physicochemical investigation of the influence of saccharide-based parenteral formulation excipients on l-p-boronphenylalanine solubilisation for boron neutron capture therapy
Cyclopentane-1,3-dione: A Novel Isostere for the Carboxylic Acid Functional Group. Application to the Design of Potent Thromboxane (A2) Receptor Antagonists
The ‘‘GI dissolution’’ method: a low volume, in vitro apparatus for assessing the dissolution/precipitation behaviour of an active pharmaceutical ingredient under biorelevant conditions
Structural and thermodynamic analyses of alpha-L-fucosidase inhibitors
New ideas about the solubility of drugs
Assessment of distribution- pH profiles
Multiwavelength spectrophotometric determination of acid dissociation constants Part VI. Deconvolution of binary mixtures of ionizable compounds
Physicochemical characterization of sildenafil: Ionization, lipophilicity behaviour, and ionic-partition diagram studied by two-phase titration and electrochemistry
Ionization Constants and Ionization profiles
Measuring Physiochemical Properties 2
4‐case chart to classify supersaturation and precipitation behavior
Measuring pKa values in 2-propanol to gain process understanding
Ionization Constants of Isoniazid and Benzimidazole
pH-metric titration to characterize aci-nitro tautomerism
Effects of solubility enhancing excipients
Faster Dissolution Methods
Low Volume Dissolution Assays
The effect of dissolution media, torque and flow speed
Biphasic dissolution studies of Felodipine
Dissolution & precipitation studies of carbamazepine cocrystals with small scale assays
Dissolution in presence of lipid to mimic absorption
Dissolution Experiments in Lipid Layers
Small scale assays for studying dissolution of cocrystals
Small volume dissolution of a poorly soluble drug as solid dispersions
Solubility of drugs in the presence of excipients in lipid based formulations
Supersaturation & precipitation of ionizable drugs with cellulose polymers
Physicochemical Studies of Triclosan
Simulated Lung Fluid media
Solubility measurement by extrapolation
Solubilities of morphine analogs
Characteristics of Felodipine ‐ HPMCAS Solid Dispersions
Dissolution Performance of Inhaled Products in Simulated Lung Fluid
In-situ Solubility Measurements of Ionizable Drugs
Determination of Aqueous Solubility by Extrapolation
A low volume method for screening Plasdone® polymers
Assay Expert Flyer
AN410 Measuring the isoelectric point pf peptides by potentiometric titration
AN15 Determination of pKa Measurement or Prediction?
AN14 Using NaOH and NaCL instead of KOM and KCI
AN13 Measuring Solubility What’s Best for You?
AN12 Introduction to logP and logD Measurement Using SiriusT3
AN10 Measuring LogP of Samples that are Hard to Dissolve in Water and Octanol
AN09 The Determination of Solubility - Pion CheqSol Explained
AN08 Solubility and Supersaturation - A Brief Introduction
AN07 the Pion GI Dissolution Assay
AN06 The use of cosolvent pKa assays for poorly soluble compounds
AN05 Measurement of extreme pKas
AN04 Insights into BCS classification using Pion assays
AN03 Blank Titrations Using the SiriusT3
AN02 PKa measurements in 15 minutes - the SiriusT3 Fast UV pKa method
AN01 High quality measurements for small sample amounts
Pion SDi2 and Raman spectroscopy - study of diclofenac sodium salt
Behavior of Basic Compounds in the Presence of Plasdone Polymers
Determination of pKa values and Solubility pH Profiles of Selected ß blockers
Supersaturation in additives and GI fluids
Validation of titrimetric measurement of pKa, logP and solubility
The intrinsic solubility of indomethacin
Measuring the solubility of salts of basic drugs
Potentiometric techniques for measuring solubility at 37°C
Karl Box Sunrise Presentation
Determination of Polymer Effectiveness
Utilization of pH-Metric Titration
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