Sodium Alginate Pure 50g (Alginic Sodium Salt, Laboratory Reagent Grade)

Sodium Alginate Pure 50g, also known as Alginic Sodium Salt or Algin, is a high‑quality Laboratory Reagent (LR) grade biopolymer derived from natural seaweed sources. It is widely used in educational science laboratories for its unique gel‑forming properties when combined with calcium ions.

Supplied in a convenient 50g pack, Sodium Alginate is identified by CAS Number 9005‑38‑3 and does not require a UN classification. Its safe handling characteristics and versatility make it particularly suitable for use in school and college science departments, supporting both chemistry and biology practical work.

Key Features

• Sodium Alginate (Alginic Sodium Salt / Algin)
• Laboratory Reagent (LR) Grade
• 50g pack – ideal for classroom experiments
• CAS Number: 9005‑38‑3
• No UN classification
• Natural, water‑soluble polymer
• Forms gels in the presence of calcium ions

Ideal for School Science Lessons

Sodium Alginate is especially popular in KS3, GCSE, and A‑Level science lessons due to its engaging, hands‑on applications. It is frequently used to demonstrate concepts in polymers, diffusion, and biotechnology, making lessons both interactive and memorable for students.

• Creating alginate beads to demonstrate gel formation
• Exploring polymers and biomaterials in chemistry
• Supporting biology lessons on cellular models and diffusion
• Practical activities simulating immobilised enzymes
• Encouraging investigative skills through safe, hands‑on experimentation

Safe, versatile, and easy to use, Sodium Alginate is an excellent teaching resource that helps bring abstract scientific concepts to life while supporting practical learning and good laboratory practice in educational science environments.