Sodium Iodide Crystals Granular ≥99% Lab Grade


Sodium Iodide Crystals | Ultra Pure Powder | Granular Form | Laboratory Reagent Grade | ≥99% Purity | Ionic Compound | White, Water-Soluble Solid | Formula NaI | Inorganic Sodium Salt & Iodide Salt | For Supplements & Organic Chemistry | CAS # 7681-82-5

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Order Sodium Iodide Crystals Online At For Dogs, Sodium Iodide For Hyperthyroidism, Elephant Toothpaste, Horses, Cattle, Thyroid Storm, Ringworm, Actinomycosis And Lumpy Jaw

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If you have questions about ordering sodium iodide crystals in bulk online here at or would like to place an order, call 512-668-9918 or email to talk with a Sodium Iodide Specialist. Lab Alley is a wholesale supplier and distributor of sodium iodide based in Austin, Texas.

Information On Sodium Iodide Crystals From Wikipedia

Sodium Iodide | YouTube Video From Audiopedia


About Sodium Iodide

Sodium iodide (chemical formula NaI) is an ionic compound formed from the chemical reaction of sodium metal and iodine. Under standard conditions, it is a white, water-soluble solid comprising a 1:1 mix of sodium cations (Na+) and iodide anions (I−) in a crystal lattice. It is used mainly as a nutritional supplement and in organic chemistry. It is produced industrially as the salt formed when acidic iodides react with sodium hydroxide. It is a chaotropic salt.

Is NaI Acidic, Basic, Or Neutral (Dissolved In Water)? | YouTube Video


Food Supplement 

Sodium iodide, as well as potassium iodide, is commonly used to treat and prevent iodine deficiency. Iodized table salt contains 10 ppm iodide.

Organic Synthesis

Sodium iodide is used for conversion of alkyl chlorides into alkyl iodides. This method, the Finkelstein reaction, relies on the insolubility of sodium chloride in acetone to drive the reaction:  R–Cl + NaI → R–I + NaCl

Nuclear Medicine 

Some radioactive iodide salts of sodium, including Na125I and Na131I, have radiopharmaceutical uses, such as in the treatment of thyroid cancer and hyperthyroidism or as radiolabeling tracers in imaging (see Isotopes of iodine > Radioiodines I-123, I-124, I-125, and I-131 in medicine and biology).

Thallium-Doped NaI(Tl) Scintillators

Sodium iodide activated with thallium, NaI(Tl), when subjected to ionizing radiation, emits photons (i.e., scintillate) and is used in scintillation detectors, traditionally in nuclear medicine, geophysics, nuclear physics, and environmental measurements. NaI(Tl) is the most widely used scintillation material. The crystals are usually coupled with a photomultiplier tube, in a hermetically sealed assembly, as sodium iodide is hygroscopic. Fine-tuning of some parameters (i.e., radiation hardness, afterglow, transparency) can be achieved by varying the conditions of the crystal growth. Crystals with a higher level of doping are used in X-ray detectors with high spectrometric quality. Sodium iodide can be used both as single crystals and as polycrystals for this purpose. The wavelength of maximum emission is 415 nm.


Iodides (including sodium iodide) are detectably oxidized by atmospheric oxygen (O2) to molecular iodine (I2). I2 and I- complex to form the triiodide complex, which has a yellow color, unlike the white color of sodium iodide. Water accelerates the oxidation process, and iodide can also produce I2 by photooxidation, therefore for maximum stability sodium iodide should be stored under dark, low temperature, low humidity conditions.

Sodium Iodide Structure

Sodium iodide is a common inorganic salt that is an important source of iodine. Formula and structure: The chemical formula of sodium iodide is NaI and its molar mass is 149.89 g/mol. It is a simple ionic compound composed of the sodium cation (Na+) and iodide anion (I-), and its chemical structure is shown here.

Sodium Iodide Hazards

  • Eye: May cause eye irritation.
  • Skin: May cause skin irritation.
  • Ingestion: May cause irritation of the digestive tract.
  • Inhalation: May cause respiratory tract irritation. Irritation may lead to chemical pneumonitis and pulmonary edema.
  • Chronic: Prolonged or repeated exposure may cause adverse reproductive effects.

Sodium Iodide Uses

Sodium iodide is an iodide salt that is formed into an injectable medicine. Sodium iodide is used to treat or prevent iodine deficiency caused by poor nutrition or poor absorption by the body. Sodium iodide may also be used to treat a thyroid disorder.

Is Sodium Iodide Dangerous? 

Causes skin irritation and serious eye irritation. It is very toxic to aquatic life.

Why Is Sodium Iodide Soluble In Water? 

Originally Answered: What causes sodium iodide to be soluble in water? A compound dissolves in water whenever solvation energy (hydration energy in this case) is greater than lattice energy . Lattice energy is the energy required to break the lattice. Solvation energy is the energy released when a compound is solvated.

Sodium Iodide For Dogs

Sodium iodide has been used successfully to treat cutaneous and cutaneous/lymphadenitis forms of sporotrichosis; attempts to control various other mycotic infections with iodides yield equivocal results. The dosage for sodium iodide (20% solution) is 44 mg/kg/day, PO, for dogs, and 22 mg/kg/day, PO, for cats.

Sodium Iodide For Hyperthyroidism

Sodium iodide I 131 is an oral medication used to treat hyperthyroidism (overactive thyroid gland) and some cases of thyroid cancer. It falls under the category of an anti-thyroid drug but differs from the other anti-thyroid drugs, propylthiouracil (PTU) and methimazole (Tapazole), because it is radioactive. 

How Do You Make Elephant Toothpaste With Sodium Iodide? 

Fill the beaker with 4 ounces (that's approximately 120 mL) of room temperature water. Add about a tablespoon of sodium iodide crystals to the water and stir with a spoon until all of the crystals have dissolved.

Sodium Iodide For Horses

The dosage for horses is 125 mL of 20% sodium iodide solution, IV, daily for 3 days, then 30 g, PO, daily for 30 days after clinical remission. The dosage rate for treating actinomycosis and actinobacillosis in cattle is 66 mg/kg, by slow IV, repeated weekly. Potassium iodide should never be injected IV.

Sodium Iodide For Treating Actinomycosis (Lumpy Jaw) In Cattle

Indications: Sodium Iodide 20% is for use in cattle as an aid in treating actinomycosis (lumpy jaw), actinobacillosis (wooden tongue) and necrotic stomatitis in cattle. Animals vary in their susceptibility of iodides. Administer with caution until the animal's tolerance is determined.

Sodium Iodide For Ringworm In Cattle

Sodium iodide is registered as an injectable treatment for ringworm in cattle. It is a time-honored treatment, generally given by slow intravenous infusion, though it may be given subcutaneously. The mode of action of sodium iodide against fungal infections is unknown.

Sodium Iodide Used In Medicine

Sodium iodide is an iodide salt that is formed into an injectable medicine. Sodium iodide is used to treat or prevent iodine deficiency caused by poor nutrition or poor absorption by the body. Sodium iodide may also be used to treat a thyroid disorder. 

Sodium Iodide Industrial And Chemical Uses

Sodium iodide is commonly used as a dietary iodine supplement and included in table salt (NaCl). It is used to treat and prevent iodine deficiency.

Sodium Iodide For Organic Synthesis

Sodium iodide is used for conversion of alkyl chlorides into alkyl iodides. This method, the Finkelstein reaction, relies on the insolubility of sodium chloride in acetone to drive the reaction: R–Cl + NaI → R–I + NaCl. 

Sodium Iodide For Nuclear Medicine

This medicine is taken up mainly by the thyroid gland. In the treatment of overactive thyroid gland, the radiation from the radioactive iodine damages the thyroid gland to bring its activity back down to normal.

Common Uses Of Sodium Iodide Sold At

Chemical Properties Of Reagent Grade Sodium Iodide Granules For Sale Online At

CAS Number 7681-82-5
Molecular Formula NaI
Formula Weight 149.89
Assay (Nal) Min. 99.0%
Alkalinity (as Na2CO3) 0.02%
Barium (Ba) 0.002%
Chloride and Bromide (asCl) 0.01%
Heavy Metals (as Pb) 5 ppm
Insoluble 0.01%
Iodate (IO3) 3 ppm
Iron (Fe) 5 ppm
Phosphate (PO4) 0.001%
Sulfate (SO4) 0.005%


Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Sodium Iodide Granular Reagent.

NaI(Tl) Scintillation Crystals For Sale At Saint-Gobain Crystals 

Sodium Iodide crystals have a very high luminescence (scintillation) efficiency and are available in a wide variety of sizes and geometries that makes it the most widely used scintillator. Thallium-doped Sodium Iodide produces one of the highest signals in a PMT per amount of radiation absorbed. It is second only to our Lanthanum Bromide scintillator. Under optimum conditions, an average of 1x 104 photoelectrons are produced per MeV gamma rays.

POLYSCIN® NaI(Tl) scintillation crystals are widely recognized as suitable alternatives to single-crystal scintillators in many applications where thermal and mechanical shock are encountered, such as oil and gas exploration. This crystal offers ruggedness combined with a scintillation performance identical to single-crystal NaI(Tl).


NaI(Tl) crystals are widely used for radiation detection:

  • Medical - SPECT (gamma camera), whole-body counting, radioimmunoassay (RIA)
  • Security - Thermal neutron activation
  • Industrial - Thickness or density gauging, coal/mineral assy
  • Oil and gas exploration - well logging
  • Environmental monitoring
  • Aerial survey
  • Nuclear physics


  • High light output
  • Available in single-crystal & polycrystalline form
  • No significant self-absorption of scintillation light
  • Emission spectrum well matched with the sensitivity curve of photomultiplier tubes (PMTs) with bialkali photocathodes

Related Resources 

Product Ordering Options, Prices, Bulk Sizes & Shipping

You can buy Sodium Iodide Crystals Granular ≥99% Lab Grade for $64 online, locally or call 512-668-9918 to order bulk sizes. Your packages will be shipped in 1-2 business days via UPS or LTL. Lab Alley Brand Sodium Iodide Crystals Granular ≥99% Lab Grade is for sale in bulk sizes and is in stock. Handy individual consumer size containers for DIY projects are leak resistant. This high quality compound is made in America. It is a high purity chemical substance that is ideally suited for scientific, development, analytical, clinical, medical, research and testing applications. Sodium Iodide Crystals Granular ≥99% Lab Grade is delivered quickly to laboratories, factories and businesses in safe chemical resistant containers. 

Manufacturing size drums, IBC totes, pallet loads and bulk industrial production scale quantities are shipped from Lab Alley's U.S.-based distribution centers by LTL freight carriers. Request a discounted wholesale price quote, here. Read customer and product reviews, here. Read return and refund policies, here. Lab Alley, founded in 2013, is a reliable Sodium Iodide Crystals Granular ≥99% Lab Grade supplier and distributor headquartered near Austin, Texas. Lab Alley was a 2021 Inc. 5000 honoree. Email if you have questions about buying Sodium Iodide Crystals Granular ≥99% Lab Grade. 

Download the Sodium Iodide Crystals Granular ≥99% Lab Grade MSDS/SDS to get safety tips and health hazard information. Sodium Iodide Crystals Granular ≥99% Lab Grade should be carefully handled, stored in a cool dry place and chemical waste should be disposed of properly and safely.

Sodium Iodide Crystals Granular ≥99% Lab Grade Retail Prices, Package Sizes And Bulk Quantity Ordering Options: 25g $64, 125g $118, 500g $390, 2.5kg $1335.

Sodium Iodide Crystals Granular ≥99% Lab Grade

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