Is sodium thiosulfate profitable to sell on Amazon United States?

The niche generates $175K/yr across 17 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is +52.7%. Flapen's verdict: Worth a look (60/100).

How competitive is the sodium thiosulfate niche?

11 brands and 26 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 71% of demand.

What do buyers complain about in sodium thiosulfate?

Top complaints mined from reviews: Advertised Vs Actual Product, Contamination, Instructions/User Manual/Troubleshooting. The return rate is 1.0%.

When does demand for sodium thiosulfate peak?

Demand peaks in May–Jun–Jul; the busiest month runs 2.1× the quietest.

What does it cost to enter the sodium thiosulfate niche?

Listings span $13.16–$163.68; the average listing price is $37.97 (sweet spot $15–$100). The average incumbent carries 139 reviews — the moat a new listing must climb.

sodium thiosulfate

Worth a look

Shows low returns (1.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible1.0%

return rate — above 5% kills the launch gate

Avg price

Incredible$37.97

avg listing price — sweet spot $15–$100

Review moat

Great139.47

avg incumbent reviews — the moat a new listing must climb

Conversion

Great9.6%

search→purchase rate — share of searches ending in a sale

Growth

Good+52.7%

90-day search growth — must beat 0% to launch

Brand share

Good71%

top-5 brand share — brands hold most of the demand

Price range

Good$13.16–$163.68

cheapest to priciest tracked listing — scored on the share inside $15–$100

Competition

Okay60%

top-5 click share — leaders hold, buyers still browse

Market size

Okay$175K

$175K/yr · 48K searches

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, sodium thiosulfate is a $175K/yr Amazon United States market (48K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 60/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

sodium thiosulfate market data

Units sold / yr: 3K–4K; avg 100–250/product
Revenue / yr: $114K–$152K; units × avg price
Conversion rate: 9.6%
Avg BSR: #226
Page quality: 0%
Prime: 65%
Sponsored: 65%
Out of stock: 3.2%
Avg brand age: 74 months
Avg seller age: 176 days

Competition & brand share

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

11 flat

Sellers

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

60%

Top 20: 100%

Open market

23%

ChemCenter23%
MAV AquaDoc18%
In The Swim13%
BioGuard9%
HOLEVINT8%
UniClean America6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +52.7% search growth over the last 90 days.

Peak months: May, Jun, Jul · busiest ÷ quietest = 2.1×

Open Trend

Top sodium thiosulfate search terms

sodium thiosulfate43K/yr +54.9%7.8% conv.
sodium thiosulfate crystals3K/yr -9.6%8.4% conv.
thiosulphate2K/yr +192.7%0.2% conv.

All search terms

Top sodium thiosulfate products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Sodium Thiosulfate Fine Crystals 99.5% min. 500 Grams (1.1 lb.)

ChemCenter$18.924.7★476 rev

AquaDoc Chlorine Neutralizer for Pool & Hot Tub - 1 lb - Sodium Thiosulfate Formula to Help Reduce Chlorine Levels - Spa and Pool Chemicals Made in USA

MAV AquaDoc$20.304.6★195 rev

In The Swim Chlorine Neutralizer for Swimming Pools - Quickly Reduces Chlorine Sanitizer Levels - 90% Sodium Thiosulfate - 2.25 Pounds

In The Swim$20.694.7★542 rev

BioGuard ChemOut Chlorine & Bromine Neutralizer 2 lb Single Pack

BioGuard$24.774.6★306 rev

DIYChemicals Sodium Thiosulfate | Chlorine Neutralizer Solution Chlorine Remover for Pools Pond Aquarium Hot Tubs Hydroponic Ecosystems Plants - 40LB

Chemboys$159.404.7★34 rev

Newest

by launch date

AquaDoc Bromine Neutralizer for Pool & Hot Tub - 1 lb - Sodium Thiosulfate Formula to Reduce Bromine Levels - Spa and Pool Chemicals Made in USA

MAV AquaDoc$18.25195 rev

2mo ago

Pool Chlorine Neutralizer - Fast-Acting Sodium Thiosulfate Formula - 1 Lbs - Quickly Reduces Chlorine & Bromine Levels for Pools & Hot Tubs (1 LB)

CFUTABOH$14.646 rev

3mo ago

Sodium Thiosulfate Pool and Hot Tub Bromine and Chlorine Neutralizer Chemical Level Reducer Formula (1 lb)

HOLEVINT$13.779 rev

7mo ago

Sodium Thiosulfate Pool and Hot Tub Bromine and Chlorine Neutralizer Chemical Level Reducer Formula (2 lb)

HOLEVINT$24.309 rev

7mo ago

Sodium Thiosulfate Chlorine Neutralizer Granules (1 LB) Chlorine Remover for Pools Ponds Aquariums Hot Tubs Hydroponic Ecosystems Plants

INTOMYTH$13.163 rev

8mo ago

What buyers say about sodium thiosulfate

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

What buyers love

Quality-Overall20%

“Excellent product”

Advertised Vs Actual Product14%

“As advertised”

Value For Money11%

“Great value for the cost”

Ease Of Use9%

“Easy to use, works well”

Instructions/User Manual/Troubleshooting7%

“The instructions are clear”

Smell5%

“there is no odor”

Durability4%

“A Pound Thatll Last Me a Season and Then Some”

Strength4%

“Super effective”

Water Resistance4%

“Finally can swim”

Pureness4%

“The crystals dissolve incredibly fast”

What buyers complain about

Advertised Vs Actual Product15%

“Poor listing”

Contamination8%

“Managing water chemistry can sometimes become frustrating”

Instructions/User Manual/Troubleshooting7%

“trying to follow directions on all this stuff is crazy”

Smell6%

“I wasnt sure if they could smell something I couldnt”

Functionality-Overall6%

“it was slowly coming down”

Measurement/Reading Accuracy6%

“find yourself stuck with a spiked chemical reading”

Leak-Proof6%

“I literally had is barely set to leak bromine”

Water Resistance4%

“especially when water isn't perfect from the hose”

Size-Overall4%

“The change implemented is small”

Top return reasons

Leak-Proof21%

Value For Money19%

Advertised Vs Actual Product15%

Size-Overall14%

Functionality-Overall13%

Contamination9%

Certifications4%

Product Condition3%

Maintenance And Repair3%

Common questions

Is sodium thiosulfate profitable to sell on Amazon United States?: The niche generates $175K/yr across 17 tracked products. 1 of 5 products launched in the last 360 days are still selling. 90-day search growth is +52.7%. Flapen's verdict: Worth a look (60/100).
How competitive is the sodium thiosulfate niche?: 11 brands and 26 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 71% of demand.
What do buyers complain about in sodium thiosulfate?: Top complaints mined from reviews: Advertised Vs Actual Product, Contamination, Instructions/User Manual/Troubleshooting. The return rate is 1.0%.
When does demand for sodium thiosulfate peak?: Demand peaks in May–Jun–Jul; the busiest month runs 2.1× the quietest.
What does it cost to enter the sodium thiosulfate niche?: Listings span $13.16–$163.68; the average listing price is $37.97 (sweet spot $15–$100). The average incumbent carries 139 reviews — the moat a new listing must climb.