---
product_id: 12167698
title: "Sodium Thiosulfate, Fine Crystals, 99.5% min., 500 Grams (1.1 lb.)"
brand: "chemcenter"
price: "€ 42.75"
currency: EUR
in_stock: true
reviews_count: 9
category: "Chem Center"
url: https://www.desertcart.gr/products/12167698-sodium-thiosulfate-fine-crystals-99-5-min-500-grams-1
store_origin: GR
region: Greece
---

# indefinite shelf life 500g fine crystal pack 99.5%+ reagent purity Sodium Thiosulfate, Fine Crystals, 99.5% min., 500 Grams (1.1 lb.)

**Brand:** chemcenter
**Price:** € 42.75
**Availability:** ✅ In Stock

## Summary

> ⚗️ Elevate your lab game with crystal-clear precision!

## Quick Answers

- **What is this?** Sodium Thiosulfate, Fine Crystals, 99.5% min., 500 Grams (1.1 lb.) by chemcenter
- **How much does it cost?** € 42.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/12167698-sodium-thiosulfate-fine-crystals-99-5-min-500-grams-1)

## Best For

- chemcenter enthusiasts

## Why This Product

- Trusted chemcenter brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lab-Grade Purity:** Premium 99.5%+ reagent quality for precise scientific results
- • **Perfect Portioning:** 500 grams of fine crystals—ideal for controlled, repeatable experiments
- • **Stain-Busting Power:** Effortlessly removes stubborn iodine stains—vet-approved and user-loved
- • **Long-Term Reliability:** Indefinite shelf life means no rush, no waste, just readiness
- • **Versatile Dechlorination:** Trusted by pros to neutralize chlorine without harming aquatic life

## Overview

Sodium Thiosulfate Fine Crystals (99.5% min.) in a 500g pack, designed for laboratory and scientific use. This reagent-grade chemical offers indefinite shelf life and superior purity, making it a trusted choice for dechlorination, stain removal, and precise analytical applications. Not for food or drug use.

## Description

You are purchasing 500 grams of Reagent (99.5+ min.%) Sodium Thiosulfate, Pentahydrate. This is NOT the cheaper quality large crystals others sell for dechlorination of pools, etc. Buyer assumes all liability for the use of this item. Buyer agrees to use this item in accordance with all local, state, and federal laws. This is for laboratory and scientific use only! NOT for food or drug use. Picture may not reflect new GHS labeling.

Review: No fish trauma chlorine neutralization - Never lost a fish!
Review: Gets iodine stains out! - Gets out iodine stains! Our vet prescribed iodine to our dog and needless to say, he didn’t like it and slung iodine everywhere. This mixed with water removed the iodine when literally nothing else would work! Doesn’t take much.

## Features

- Packaging and Labeling May Vary Product has an indefintie shelf life

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00JERVY5A |
| Best Sellers Rank | #14,351 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #12 in Analytical Reagents |
| Date First Available | June 16, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.1 pounds |
| Manufacturer | RND Center Inc. |
| Product Dimensions | 3 x 3 x 5.5 inches |

## Product Details

- **Brand:** ChemCenter
- **Item Weight:** 500 Grams
- **Molecular weight:** 84.01
- **Package Information:** Bottle
- **Percentage assay:** 99.5

## Images

![Sodium Thiosulfate, Fine Crystals, 99.5% min., 500 Grams (1.1 lb.) - Image 1](https://m.media-amazon.com/images/I/617hXRA+YKL.jpg)
![Sodium Thiosulfate, Fine Crystals, 99.5% min., 500 Grams (1.1 lb.) - Image 2](https://m.media-amazon.com/images/I/81COQLlOr9L.jpg)

## Questions & Answers

**Q: Can this be used for dechlorinating tap water for aquariums?**
A: I use this product for getting stains and yellow spots out of table linens.

**Q: expiration date?**
A: Most minerals do not expire because they are natural elements, furthermore vitamins don't really expire they may lose some potency

**Q: Where in the bottle is the expiration date or manufacture date? I dont see it anywhere**
A: I don't see a date. My last purchase was May, 2019 and it still seems to be working fine. I'm reading information from different data sources for an expiration of 12 to 18 months.

**Q: Is this food grade?**
A: I don't think sodium Thiosulfate is good for the human body.   In fact I actually think it's bad because all I use it for putting patina on metals.  But I'm not an expert on what's a poison, or a chemist.  But I wouldn't eat it or feed it to anyone I loved unless I did some serious research on what it does to the human body with an experienced chemist or an MD who's a poisons expert.

## Customer Reviews

### ⭐⭐⭐⭐⭐ No fish trauma chlorine neutralization
*by S***. on September 12, 2025*

Never lost a fish!

### ⭐⭐⭐⭐⭐ Gets iodine stains out!
*by M***Y on May 3, 2025*

Gets out iodine stains! Our vet prescribed iodine to our dog and needless to say, he didn’t like it and slung iodine everywhere. This mixed with water removed the iodine when literally nothing else would work! Doesn’t take much.

### ⭐⭐⭐⭐⭐ Fast shipping
*by R***T on January 24, 2025*

Good product...dont take a long drive while taking this unless your wearing depends...cleans you out fast!!!

## Frequently Bought Together

- Sodium Thiosulfate, Fine Crystals, 99.5% min., 500 Grams (1.1 lb.)
- Silver Nitrate Crystal Powder 10 Grams / >99.9% Pure ACS Grade / 10g
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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-25*