# Vitamin C (Ascorbic Acid) Injection

> Ascorbic acid solution at 500 mg/mL in a 30 mL multi-use vial

All products are sold strictly for laboratory research use only. Not for human or veterinary use.

- Web page: https://peptidemedixeu.com/en/products/vitamin-c-injection/
- Brand: Peptide Medix EU
- Category: [Vitamins & Cofactors](https://peptidemedixeu.com/en/collections/vitamins-cofactors/)
- CAS number: 50-81-7
- from €46 (EUR)

## Sizes and prices (EUR)

| Size | Price | SKU |
| --- | --- | --- |
| 30 mL · 500 mg/mL | €46 | VITAMIN-C-INJECTION-30-ML-500-MG-ML |

_Catalog prices at build time; the web page and checkout are authoritative._

## Specifications

- **CAS number:** 50-81-7
- **Molecular formula:** C6H8O6
- **Molecular weight:** 176.12 g/mol
- **Form:** Clear, colourless to pale straw aqueous solution in a sealed glass vial
- **Concentration:** 500 mg/mL L-ascorbic acid
- **Chemical class:** Water-soluble vitamin; six-carbon lactone of a hexonic acid, redox-active
- **Chemistry note:** Weak acid; solutions are pH-adjusted, which means part of the content is present as the ascorbate anion
- **Enzyme roles:** Prolyl and lysyl hydroxylases, dopamine beta-hydroxylase, 2-oxoglutarate-dependent dioxygenases including TET and HIF-PHD
- **Research areas:** Collagen maturation, redox buffering in culture, pharmacologic-ascorbate pro-oxidant models, DNA demethylation and stem-cell studies, iron chemistry
- **Oxidation sensitivity:** High — degrades on exposure to air, light, heat and trace transition metals
- **Storage:** 2–8 °C, protected from light, tightly stoppered; do not freeze
- **Appearance check:** Discard if markedly darkened, cloudy or containing particulates

## Description

In the chemistry of the cell, ascorbate plays two roles: it is a reducing agent and a cofactor. It hands electrons to a set of enzymes that depend on iron or copper, keeping their metal ions in the reduced state — among them the prolyl and lysyl hydroxylases needed for collagen to mature, dopamine beta-hydroxylase in the making of catecholamines, and the 2-oxoglutarate-dependent dioxygenases such as the TET enzymes and the HIF prolyl hydroxylases. This last group is why ascorbate turns up so often in papers on epigenetics and on how cells sense low oxygen.

Filled at 500 mg per mL, each 30 mL vial contains a total of 15 g of ascorbic acid — far stronger than nutrition research would need, and intentionally so. One key use of concentrated ascorbate is the pharmacological pro-oxidant model: at millimolar levels outside cells, and with transition metals available as catalysts, ascorbate produces hydrogen peroxide rather than acting as an antioxidant — the reverse of what it does at normal body concentrations. Because ascorbic acid is a weak acid, the pH of the solution is adjusted, and much of it is present as the ascorbate ion. Oxidation is the constant enemy: air, light, heat and traces of metal all speed it up, and a clearly darker or cloudy solution is the visible end result.

## Frequently asked questions

### What amount of ascorbic acid does the vial hold?

15 g of L-ascorbic acid in total: 30 mL at 500 mg/mL. The certificate for your lot gives the measured assay value together with identity and pH for that batch.

### Why does the solution get darker over time?

Ascorbate is oxidised first into dehydroascorbate and then further into diketogulonic acid, and the coloured breakdown products build up. Light, heat, air and small amounts of metals like iron and copper all make this happen faster. If the vial has darkened markedly, gone cloudy or contains particles, discard it instead of testing it.

### Do you provide a certificate of analysis?

Yes. Each lot comes with a certificate stating identity, measured concentration, pH and appearance, which we send if you quote the lot number shown on the vial. For a compound that oxidises this easily, having the assay documented is particularly important.

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All products offered on this website are intended solely for in-vitro laboratory research and development by qualified professionals. They are not drugs, foods, cosmetics or dietary supplements, and are not intended to diagnose, treat, cure or prevent any disease. Products must not be introduced into humans or animals in any manner. By purchasing, you confirm that you are a qualified researcher and accept full responsibility for handling and storage in accordance with applicable laws.

Peptide Medix EU · https://peptidemedixeu.com/en/products/vitamin-c-injection/