---
title: "phosphoric acid — Niche Verdict: Skip it (49/100) | Amazon United States - Flapen"
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last_updated: "2026-07-10T00:50:52.189Z"
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  description: "a small market ($120K/yr) — phosphoric acid doesn't clear our bar today."
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  "og:title": "phosphoric acid — Niche Verdict: Skip it (49/100) | Amazon United States - Flapen"
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# **phosphoric acid**

**Skip it****49/100 **

a small market ($120K/yr) — phosphoric acid doesn't clear our bar today.

**Market/yr**

**$120K**

**Growth (1y)**

**+273.6%**

**Products**

**19**

**Brands**

**12**

was 9 a year ago

**Sellers**

**44**

**Price range**

**$6.35–$67.33**

**Returns**

**0.0%**

**Rating**

**4.6★**

**Skip it**

Scored 49/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns

Market size

**6**

 ×0.30

Growth

**83**

 ×0.30

Competition

**44**

 ×0.20

Quality gap

**34**

 ×0.10

Returns

**100**

 ×0.10

## **Demand**

Weekly Amazon search volume, last 104 weeks — +273.6% year over year.

7K3KSpike '24Spike '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

## **Seasonality**

Monthly demand index across the year — 1.00 is average.

JFMAMJJASOND

Peak months: Apr, May, Jun · busiest ÷ quietest = 3.0×

## **Competition**

- Duda Energy20% - Chemboys15% - CCS CONSOLIDATED CHEMICAL & SOLVENTS14% - Miracle Sealants14% - Ospho12% - Alliance Chemical7% - Other (6 brands)18%

The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them. 12 brands and 44 sellers compete here.

**Brands**

**12 **▲rising

was 9 a year ago

**Sellers**

**44**

**Top 5 brand share**

**75%**

#ProductBrandPriceRatingReviewsClick shareTrend

1
![DIYChemicals Phosphoric Acid 85% Rust Remover Wood Stain Remover pH Control High Purity Orthophosphoric Acid for Metal Fertilizers - Made in USA - Half Gallon (64 fl oz)](https://m.media-amazon.com/images/I/31JCkcafvML.jpg) [**DIYChemicals Phosphoric Acid 85% Rust Remover Wood Stain Remover pH Control High Purity Orthophosphoric Acid for Metal Fertilizers - Made in USA - Half Gallon (64 fl oz)**](https://www.amazon.com/dp/B094Q78NL3)

Chemboys$50.354.5★7314%▼falling

2
![Phosphoric Acid 85% - High Purity Industrial Grade - Premium Multi-Purpose Use for Cleaning Etching Rust Removal and More. (100mL)](https://m.media-amazon.com/images/I/31mATeptKcL.jpg) [**Phosphoric Acid 85% - High Purity Industrial Grade - Premium Multi-Purpose Use for Cleaning Etching Rust Removal and More. (100mL)**](https://www.amazon.com/dp/B08N597GKG)

CCS CONSOLIDATED CHEMICAL & SOLVENTS$15.974.5★13214%▲rising

3
![Miracle Sealants Phosphoric Acidic Cleaner for Tile Stone Pavers & Masonry Grout Haze Rust Stain & Efflorescence Remover Quart](https://m.media-amazon.com/images/I/41ao3ifziJL.jpg) [**Miracle Sealants Phosphoric Acidic Cleaner for Tile Stone Pavers & Masonry Grout Haze Rust Stain & Efflorescence Remover Quart**](https://www.amazon.com/dp/B000VX1XDE)

Miracle Sealants$21.504.2★21112%▼falling

4
![Ospho Metal Treatment Gallon - Rust Converter for Metal Surfaces - Rust Remover for Cars Boats Trucks 1 Gallon](https://m.media-amazon.com/images/I/31ifFY5x9ML.jpg) [**Ospho Metal Treatment Gallon - Rust Converter for Metal Surfaces - Rust Remover for Cars Boats Trucks 1 Gallon**](https://www.amazon.com/dp/B00IDTGW84)

Ospho$36.494.6★1,42611%▲rising

5
![Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal](https://m.media-amazon.com/images/I/31QnoF1xQgL.jpg) [**Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal**](https://www.amazon.com/dp/B06Y1B82TG)

Duda Energy$32.754.8★21410%▼falling

6
![Duda Energy 85% Food Grade Phosphoric Acid - Choose from a Variety of Sizes (1 Gallon)](https://m.media-amazon.com/images/I/41u-AgKIDtL.jpg) [**Duda Energy 85% Food Grade Phosphoric Acid - Choose from a Variety of Sizes (1 Gallon)**](https://www.amazon.com/dp/B00KC74G2O)

Duda Energy$51.434.8★21410%▲rising

7
![Alliance Chemical Phosphoric Acid 85% USP Food Grade - 2 Quarts (2 x 32 FL Oz) - for pH Adjustment Food Processing and General Use](https://m.media-amazon.com/images/I/51CKWdU7RhL.jpg) [**Alliance Chemical Phosphoric Acid 85% USP Food Grade - 2 Quarts (2 x 32 FL Oz) - for pH Adjustment Food Processing and General Use**](https://www.amazon.com/dp/B0CDD6P2YS)

Alliance Chemical$39.064.6★506%▲rising

8
![Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 32 Ounce](https://m.media-amazon.com/images/I/41qyZ6fDHTL.jpg) [**Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 32 Ounce**](https://www.amazon.com/dp/B0BW3G96VV)

Humboldts Secret$20.364.7★4665%▼falling

9
![jecudi Ospho Metal Treatment Gallon - Rust Converter for Metal Surfaces - Rust Remover for Cars Boats Trucks - Compatible with Most Vehicle Paints - Suitable for Indoor Use - Bonus Cleaning Towel](https://m.media-amazon.com/images/I/31s0NaOeveL.jpg) [**jecudi Ospho Metal Treatment Gallon - Rust Converter for Metal Surfaces - Rust Remover for Cars Boats Trucks - Compatible with Most Vehicle Paints - Suitable for Indoor Use - Bonus Cleaning Towel**](https://www.amazon.com/dp/B0CQKP9TFX)

jecudi$45.144.5★2885%▲rising

10

![Phosphoric Acid 85% (32 Oz / 946 mL) 85% Phosphoric Acid Food Grade Technical Grade Liquid Rust Remover Metal Cleaner pH Adjuster DIY Applications](https://m.media-amazon.com/images/I/31WhPJ0z5PL.jpg) [**Phosphoric Acid 85% (32 Oz / 946 mL) 85% Phosphoric Acid Food Grade Technical Grade Liquid Rust Remover Metal Cleaner pH Adjuster DIY Applications**](https://www.amazon.com/dp/B0FHBZK1LB)

Talsen Chemicals$22.844.7★174%▼falling

11

![Miracle Sealants Phosphoric Acidic Cleaner for Tile Stone Pavers & Masonry Grout Haze Rust Stain & Efflorescence Remover Gallon](https://m.media-amazon.com/images/I/41bGStX7BOL.jpg) [**Miracle Sealants Phosphoric Acidic Cleaner for Tile Stone Pavers & Masonry Grout Haze Rust Stain & Efflorescence Remover Gallon**](https://www.amazon.com/dp/B00502YAKE)

Miracle Sealants$40.644.2★2112%—flat

12

![Phosphoric Acid 85% - Rust Remover - Lime Cleaner - Scale Remover - UniClean America - USA (Size: 32 fl oz)](https://m.media-amazon.com/images/I/3161y2a7D9L.jpg) [**Phosphoric Acid 85% - Rust Remover - Lime Cleaner - Scale Remover - UniClean America - USA (Size: 32 fl oz)**](https://www.amazon.com/dp/B0C5LGH48T)

UniClean America$28.115.0★91%▲rising

13

![Phosphoric Acid 85% Technical Grade - 1 Gallon - Uses: PH Control and Adjustment Corrosion Inhibitor Activating Agent Personal Care Pharmaceutical Agriculture - Made in America](https://m.media-amazon.com/images/I/41V1ULj+ZNL.jpg) [**Phosphoric Acid 85% Technical Grade - 1 Gallon - Uses: PH Control and Adjustment Corrosion Inhibitor Activating Agent Personal Care Pharmaceutical Agriculture - Made in America**](https://www.amazon.com/dp/B010199QIQ)

Alliance Chemical$67.334.5★721%▼falling

14

![Phosphoric Acid 10% Solution - 8 Ounce for Beer Making](https://m.media-amazon.com/images/I/419vFxh8qoL.jpg) [**Phosphoric Acid 10% Solution - 8 Ounce for Beer Making**](https://www.amazon.com/dp/B01D2935QQ)

LD Carlson$11.504.4★1071%—flat

15

![DIYChemicals Phosphoric Acid 85% Rust Remover Wood Stain Remover pH Control High Purity Orthophosphoric Acid for Metal Fertilizers - Made in USA - 1 Gallon (128 fl oz)](https://m.media-amazon.com/images/I/31JCkcafvML.jpg) [**DIYChemicals Phosphoric Acid 85% Rust Remover Wood Stain Remover pH Control High Purity Orthophosphoric Acid for Metal Fertilizers - Made in USA - 1 Gallon (128 fl oz)**](https://www.amazon.com/dp/B094PYY6DG)

Chemboys$64.594.2★161%—flat

**~~Showing 15 of 19 — show all ~~**

## **Product shelf**

All 19 tracked products in this niche.

Top sellersNewestTrending

[![DIYChemicals Phosphoric Acid 85% Rust Remover Wood Stain Remover pH Control High Purity Orthophosphoric Acid for Metal Fertilizers - Made in USA - Half Gallon (64 fl oz)](https://m.media-amazon.com/images/I/31JCkcafvML.jpg)**DIYChemicals Phosphoric Acid 85% Rust Remover Wood Stain Remover pH Control High Purity Orthophosphoric Acid for Metal Fertilizers - Made in USA - Half Gallon (64 fl oz)** Chemboys**$50.35**4.5★73 reviews](https://www.amazon.com/dp/B094Q78NL3) [![Phosphoric Acid 85% - High Purity Industrial Grade - Premium Multi-Purpose Use for Cleaning Etching Rust Removal and More. (100mL)](https://m.media-amazon.com/images/I/31mATeptKcL.jpg)**Phosphoric Acid 85% - High Purity Industrial Grade - Premium Multi-Purpose Use for Cleaning Etching Rust Removal and More. (100mL)** CCS CONSOLIDATED CHEMICAL & SOLVENTS**$15.97**4.5★132 reviews](https://www.amazon.com/dp/B08N597GKG) [![Miracle Sealants Phosphoric Acidic Cleaner for Tile Stone Pavers & Masonry Grout Haze Rust Stain & Efflorescence Remover Quart](https://m.media-amazon.com/images/I/41ao3ifziJL.jpg)**Miracle Sealants Phosphoric Acidic Cleaner for Tile Stone Pavers & Masonry Grout Haze Rust Stain & Efflorescence Remover Quart** Miracle Sealants**$21.50**4.2★211 reviews](https://www.amazon.com/dp/B000VX1XDE) [![Ospho Metal Treatment Gallon - Rust Converter for Metal Surfaces - Rust Remover for Cars Boats Trucks 1 Gallon](https://m.media-amazon.com/images/I/31ifFY5x9ML.jpg)**Ospho Metal Treatment Gallon - Rust Converter for Metal Surfaces - Rust Remover for Cars Boats Trucks 1 Gallon** Ospho**$36.49**4.6★1,426 reviews](https://www.amazon.com/dp/B00IDTGW84) [![Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal](https://m.media-amazon.com/images/I/31QnoF1xQgL.jpg)**Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal** Duda Energy**$32.75**4.8★214 reviews](https://www.amazon.com/dp/B06Y1B82TG) [![Duda Energy 85% Food Grade Phosphoric Acid - Choose from a Variety of Sizes (1 Gallon)](https://m.media-amazon.com/images/I/41u-AgKIDtL.jpg)**Duda Energy 85% Food Grade Phosphoric Acid - Choose from a Variety of Sizes (1 Gallon)** Duda Energy**$51.43**4.8★214 reviews](https://www.amazon.com/dp/B00KC74G2O) [![Alliance Chemical Phosphoric Acid 85% USP Food Grade - 2 Quarts (2 x 32 FL Oz) - for pH Adjustment Food Processing and General Use](https://m.media-amazon.com/images/I/51CKWdU7RhL.jpg)**Alliance Chemical Phosphoric Acid 85% USP Food Grade - 2 Quarts (2 x 32 FL Oz) - for pH Adjustment Food Processing and General Use** Alliance Chemical**$39.06**4.6★50 reviews](https://www.amazon.com/dp/B0CDD6P2YS) [![Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 32 Ounce](https://m.media-amazon.com/images/I/41qyZ6fDHTL.jpg)**Humboldts Secret pH Down for Plants | Liquid pH Adjuster and Balancer for Soil Coco Hydroponics | Concentrated Phosphoric Acid Solution Supporting Nutrient Uptake and Strong Growth | 32 Ounce** Humboldts Secret**$20.36**4.7★466 reviews](https://www.amazon.com/dp/B0BW3G96VV)

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Quality-Overall**21%

*“Quality product”*

**Rusts/Corrodes**18%

*“Workes very well on rust”*

**Advertised Vs Actual Product**10%

*“Does exactly as advertised”*

**Ease Of Use**9%

*“It was quick”*

**Value For Money**7%

*“the cost savings are insane”*

**Leak-Proof**7%

*“The liquid was not spilled”*

**Ease Of Cleaning**5%

*“Its extremely clean and stable”*

**Thickness**3%

*“I like the thickness too”*

**Taste-Overall**3%

*“It was delicious”*

**Size-Overall**3%

*“Right size for small job”*

### **What buyers complain about **

**Rusts/Corrodes**29%

*“RUST IS GONE”*

**Leak-Proof**18%

*“Leaked out”*

**Value For Money**11%

*“Per ounce price is off”*

**Functionality-Overall**7%

*“nothing worked”*

**Ingredients-Overall**5%

*“Macsweetie's Acid Phosphate is a throwback to a bygone era when you could go to a local drug store”*

**Dilute/Watery**5%

*“Not in liquid form”*

**Color**5%

*“in a very short amount of time turned it black”*

**Strength**5%

*“STRONG”*

**Ease Of Cleaning**4%

*“This bottle is a mess”*

**Quality-Overall**2%

*“the company is crap”*

#### **Top return reasons**- Leak-Proof41% - Advertised Vs Actual Product27% - Magnesium9% - Certifications9% - Stain Resistance5% - Size-Overall5% - Value For Money5%