Complete Standard Physical & Chemical Specification Parameters
Basic Product Identification Information
Full Standard Product Name: Truncated Short-Chain Polypeptide Transient Endocrine & Cardiac Signal Laboratory Culture Solid Research Reagent
Alias: N-Terminal Tri-Residue Deletion Growth Factor Analog Synthetic Sixty-Seven-Amino-Acid Pituitary Cell Short-Term Metabolism Laboratory Lyophilized Powder
Peptide Sequence: Amino acid residues 4–70 of native full-length growth factor, terminal tri-residue segment omitted
Theoretical Molecular Weight: 7365.4 Da
Appearance Morphology: Uniform off-white to pale yellow freeze-dried solid powder, free of caking, discoloration, deep brown oxidation spots, tiny foreign particles or visible insoluble impurities
Odor Feature: Fully odorless
Solubility Characteristic: Completely miscible with laboratory bacteriostatic purified water and neutral PBS buffer liquid; insoluble in alcohol-based organic solvents, aqueous solubility ≥100mg/mL
Reconstituted Liquid Appearance: Transparent pale yellow clear liquid after full gentle dissolution, without turbidity, floccules, sediment or suspended particles
pH Value of Standard 1mg/mL aqueous mixed solution: 6.8 ~ 7.5
Residual Moisture Index (Karl Fischer titration): ≤ 8.0 %
Stabilizer Composition: Acetate carrier, zero animal-derived components
Endotoxin Level: ≤ 0.1 EU/μg, fully compliant with global universal biosafety standards for in-vitro cell basic laboratory research
Total Heavy Metal Impurity Limit Standard: Comprehensive total heavy metal pollutants ≤10ppm (integrated combined detection of various heavy metal elements, no separate marking of single metal elements)
Microbiological Control Standard: Total aerobic bacteria <10 CFU/mg, mold & yeast <5 CFU/mg; no pathogenic microorganisms detected in all finished batches
Molecular Structural Integrity Standard: Every batch undergoes spectrum matching, peptide mapping and mass spectrometry verification to confirm intact full sixty-seven-amino-acid chain and complete core receptor binding domain structure, without peptide chain fracture or amino acid oxidative hydrolysis defects