Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Information
Name: Oxytocin
Alias: 3-Isoleucine-8-leucine vasopressin
CAS No.: 50-56-6
Molecular Formula: C43H66N12O12S2
Molecular Weight: 1007.19
2. Physical and Chemical Properties
Physical Properties
- Appearance: White or off-white crystalline lyophilized powder
- Odor: Odorless
- Solubility: Freely soluble in water and dilute acidic aqueous solution; slightly soluble in methanol; insoluble in ethanol, acetone, chloroform and alkane solvents
- Specific Rotation: [α]D2? ?26° ~ ?32° (1% aqueous acetic acid solution)
- Hygroscopicity: Moderately hygroscopic under high humidity
- UV Characteristic: Weak ultraviolet absorption peak at characteristic wavelength of peptide bonds
Chemical Properties
- Molecular structure: Cyclic nonapeptide hormone with intramolecular disulfide bond between two cysteine residues
- Disulfide bond characteristic: Disulfide bridge is easily broken by reducing agents, resulting in loss of biological activity
- Hydrolysis susceptibility: Peptide bonds hydrolyze under strong acid, strong alkali or high temperature, decomposing into single amino acids
- pH stability: Stable in weak acidic environment; rapidly inactivated under alkaline conditions
- Photostability: Sensitive to strong UV light; long-term illumination causes oxidation and impurity generation
- Compatibility: Compatible with neutral aqueous excipients; incompatible with strong oxidants, reducing agents, heavy metal ions and alkaline raw materials
3. Main Application Fields
1. Pharmaceutical API (Core Application)
- Clinical obstetric hormone drug: Stimulates uterine smooth muscle contraction to induce labor and treat postpartum hemorrhage
- Lactation-promoting medicine: Stimulates mammary gland myoepithelial cell contraction to promote milk ejection
- Raw material for injection liquid preparations for hospital clinical use
2. Biochemical Research Reagent
- Standard reference substance for HPLC quantitative detection of polypeptide hormones
- Cell experiment tool for oxytocin receptor binding and reproductive signal pathway research
3. Animal Husbandry Veterinary Raw Material
Veterinary injection raw material for livestock delivery assistance and milk ejection promotion
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 50-56-6 |
| Molecular Formula | C43H66N12O12S2 |
| Molecular Weight | 1007.19 |
| Appearance | White crystalline powder |
| HPLC Purity | Pharma Grade ≥98.0%; Reference Standard ≥99.5% |
| Water Content (KF) | ≤0.50% |
| Residue on Ignition | ≤0.10% |
| Heavy Metals (Pb) | ≤10 ppm |
| Arsenic (As) | ≤2 ppm |
| Packaging | Nitrogen-filled amber aluminum foil vacuum bag, low-temperature sealed packaging |
| Storage Condition | Hermetic, light-proof cold storage below 2–8 °C; strictly avoid high temperature, reducing substances and alkaline environment |
| Transportation Requirement | Bioactive polypeptide raw material, cold-chain light-resistant sealed packaging |
| Shelf Life | 24 months under intact low-temperature nitrogen-filled vacuum packaging |
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