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Calcium Sulfate Dihydrate - Gypsum - CaSO4*2H2O - 5 Pounds

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Brand Alpha Chemicals
Item weight 2.31 kg
Item form Powder
Coverage Medium
Liquid volume 5 Liters
Specific uses for product Soil Conditioning
Manufacturer Alpha Chemicals
UPC 725410978991

About this item

  • Feed Grade
  • Very fine powder
  • Used as a soil conditioner, soil pH reducer, and many other uses.
  • Also known as Gypsum.

Product details

  • Is discontinued by manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 22.86 x 34.29 x 12.07 cm; 2.31 kg
  • Date First Available ‏ : ‎ Sept. 15 2014
  • Manufacturer ‏ : ‎ Alpha Chemicals
  • ASIN ‏ : ‎ B008LEV0V0
  • Item model number ‏ : ‎ CASO42H2O
  • Customer Reviews:

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Product description

Calcium sulfate dihydrate is a good source of calcium and sulfur that has many uses including soil conditioner, lowers soil pH, along with a wide range of other uses.

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Customer reviews

4.6 out of 5 stars
4.6 out of 5
806 global ratings

Top review from Canada

jessica
1.0 out of 5 stars Misleading description
Reviewed in Canada on June 1, 2021
Verified Purchase
Listing says food grade

Bag says not for human consumption
7 people found this helpful
Helpful
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Top reviews from other countries

Treebeard
5.0 out of 5 stars Laboratory quality: easiy dissolves. Great product for experienced user.
Reviewed in the United States on May 19, 2018
Verified Purchase
This is an excellent quality gypsum. It is laboratory grade, meaning you don't need to use as much compared to most forms of gypsums found at local lawn and garden stores. It is a fine powder which is easy to measure out and use. Decent quality bag for a fertilizer also.

I have used this succesfully to soak grains for oyster mushroom mycellium innoculation. It takes about 5 gallons of hot water to thoroughly dissolve 2/3 cups of the gypsum powder and some of the powder still falls out when it cools. I am very happy with how this dissolves compared to other products and is a primary reason I continue to use it.

I would recommend this product to anyone who is familiar with their fertilizers enough to mix their own.

I would not recommend it for the basic homeowner wanting to treat a lawn or garden because it lacks other additives used to make it cling to the soil (time-release) and also make it less dusty (user friendly) so it doesn't powder up in your face when you use it. It also doesn't have the sulfur commonly found in gypsum mixtures.

Again, this is a great product, but its for more specialized use in my opinion. Most negative reviews I have read are related to the consumer needing a different product for their specific need.
Customer image
Treebeard
5.0 out of 5 stars Laboratory quality: easiy dissolves. Great product for experienced user.
Reviewed in the United States on May 19, 2018
This is an excellent quality gypsum. It is laboratory grade, meaning you don't need to use as much compared to most forms of gypsums found at local lawn and garden stores. It is a fine powder which is easy to measure out and use. Decent quality bag for a fertilizer also.

I have used this succesfully to soak grains for oyster mushroom mycellium innoculation. It takes about 5 gallons of hot water to thoroughly dissolve 2/3 cups of the gypsum powder and some of the powder still falls out when it cools. I am very happy with how this dissolves compared to other products and is a primary reason I continue to use it.

I would recommend this product to anyone who is familiar with their fertilizers enough to mix their own.

I would not recommend it for the basic homeowner wanting to treat a lawn or garden because it lacks other additives used to make it cling to the soil (time-release) and also make it less dusty (user friendly) so it doesn't powder up in your face when you use it. It also doesn't have the sulfur commonly found in gypsum mixtures.

Again, this is a great product, but its for more specialized use in my opinion. Most negative reviews I have read are related to the consumer needing a different product for their specific need.
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37 people found this helpful
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Mike M.
5.0 out of 5 stars Good quality
Reviewed in the United States on December 3, 2023
Verified Purchase
Item arrived on time and undamaged
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Ms. Rivers
5.0 out of 5 stars Been using it for years
Reviewed in the United States on December 26, 2023
Verified Purchase
It’s exactly what I need for my mix.
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Daniel Gutierrez
5.0 out of 5 stars Perfect for cvg
Reviewed in the United States on September 8, 2023
Verified Purchase
Got this for some CVG mix... its super fine powder and easy to mix into the sub while dry, or mix with water.
Customer image
Daniel Gutierrez
5.0 out of 5 stars Perfect for cvg
Reviewed in the United States on September 8, 2023
Got this for some CVG mix... its super fine powder and easy to mix into the sub while dry, or mix with water.
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2 people found this helpful
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Richard H Erdrich
4.0 out of 5 stars OK value, will last me a while
Reviewed in the United States on May 14, 2020
Verified Purchase
Best price I've seen in small quantities
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