How many grams would you add to a gallon of water to make a 7% sodium hydroxide solution?

You would use a “percent by weight/volume” calculation, since you’re dissolving a compound by weight into a fixed volume of solution. The units must all be in the same system of measurement. In your example, to get a 7% solution you would first convert the gallon volume to milliliters, which is 3785.41 ml. Multiply that by .07 to get the the weight of NaOH in grams to add to the water. This works because 1mL water equals 1 gram.

Would this product be good for clearing a clogged sink/tub drain?

You certainly could, but it would be a hugely expensive waste to use laboratory-grade sodium hydroxide, which is costing nearly $4 per ounce, when you get ordinary “pure” (but no lab-grade) for less than fifty cents an ounce. That’s an 800% premium, and I’ll wager that the lab-grade pellets are not the best form for a drain anyway. The smaller tiny beads in drain-cleaner form will flow through a drain more easily. Amazon sells lots of the “pure” drain cleaner. Buy that instead.

Lab-grade sodium hydroxide pellet, 100g: how many pellets are in a 100 g bottle?

The pellets are cherry-pit-sized, so maybe 1000. I’ll post a review with a picture.

Lab-grade sodium hydroxide pellet, 100g: does this mean that one pellet weighs 100g?

It means the total weight of the pellets inside the bottle is 100g. -hBARSCI

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Lab-Grade Sodium Hydroxide Pellet, 100g - The Curated Chemical Collection

Lab-Grade Sodium Hydroxide Pellet, 100g - The Curated Chemical Collection

Product ID: 55379833

Details

Brand
ALDON
Item Weight
0.1 kg
Molecular formula
NaOH
Molecular weight
40
Product Grade
Lab

⏳controlled gradual dissolution

🧊solid pellet form for easy handling

⚗️99%+ purity lab-grade

156.30 DT

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Description

⚗️ Elevate your experiments with lab-grade precision and control!

EFFORTLESS HANDLING - Solid pellets mean no messy spills or splashes—measure and transfer with confidence every time.
LONG TERM RELIABILITY - Stable shelf life with secure storage instructions keeps your lab stocked and ready for action.
VERSATILE LAB ESSENTIAL - Perfect for synthesis, titrations, pH control, and reagent prep—your all-in-one chemical powerhouse.
PRECISION PURITY GUARANTEED - Lab-grade NaOH with 99%+ purity ensures your experiments stay flawless and reproducible.
CONTROLLED REACTION DYNAMICS - Slow, steady dissolution lets you manage pH adjustments without sudden temperature spikes.

This 100g bottle of lab-grade sodium hydroxide pellets offers ultra-high purity (99%+), solid pellet form for safe and precise handling, and a controlled dissolution rate ideal for gradual pH adjustments. Trusted by professionals for synthesis, titrations, and reagent preparation, it combines reliability with versatility, making it a must-have for any serious laboratory setup.

Specifications

ASIN	B077T7K9V2
Best Sellers Rank	#69,354 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #51 in Inorganic Reagents
Brand Name	ALDON
Container Type	Bottle
Customer Reviews	4.6 4.6 out of 5 stars (239)
Global Trade Identification Number	00724832002666
Item Form	Pellet
Item Weight	0.1 kg
Manufacturer	Innovating Science
Model Number	IS28113
Molecular Formula	NaOH
Molecular Weight	40
Part Number	IS28113
Product Grade	Lab
UPC	724832002666
Unit Count	1 Count
Volume	20.29 fluid ounces

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TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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156.30 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

View all Trustpilot reviews