The title says 120cc but the description says 30cc which is it???

it is 4oz. So the bottle it comes in is about 3 inches tall and approximately 1-3/4 inches in diameter. hope that helps.

Can I used it in a magnetic vacuum seal?

The EFH-1 type listed here is not recommended for use in speakers and I would guess that EFH 1 would not have the correct viscosity for use in seals.

What is the size of the nanoparticles in nm? Can you wash off the oil and resuspend in water?

i don't remember what the size was, although 4 nano meters comes to mind. If you removed the oil and tried to suspend them in water, the particles would oxidize(being exposed to oxygen) and would gather together into redish clumps. All the smooth fluidity would be no more.

Is this an authentic ferrotec fluid? what is the model number for it? amgxxx emgxxx etc etc etc

Yes, .. this efh1... part number is 92u40000000 / lot number v121021a.. this educational FF.. not for speakers etc

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Ferrofluid 4 oz 120 cc bottle Great for Science Projects

Ferrofluid 4 oz 120 cc bottle Great for Science Projects

Product ID: 93870051

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🎓STEM approved

🔬120cc of fun

🧲Magnetic magic

Description

✨ Dive into the science of fun!

MADE IN THE USA - Quality you can trust from a local manufacturer.
UNLEASH CREATIVITY - Transform science projects into mesmerizing displays!
PERFECT FOR ALL AGES - Recommended for ages 3 and up—science knows no bounds!
STEM LEARNING MADE FUN - Engage young minds with hands-on color recognition.
NO BATTERIES NO PROBLEM - Ready to use right out of the box—just add imagination!

This 4 oz (120 cc) bottle of ferrofluid is perfect for educational projects, offering a hands-on experience that promotes color recognition and creativity. Made from synthetic magnetic materials, it requires no batteries and is suitable for ages 3 and up. Manufactured in the USA, it's an ideal addition to any STEM curriculum.

Specifications

Educational Objective(s)	Color Recognition
Model Number	F-4oz
Number of Puzzle Pieces	1
Assembly Required	No
Batteries Required	No
Batteries Included	No
tech_spec_battery_description_toys	No batteries required
Material Type(s)	Synthetic,Magnetic
Package Dimensions	17.3 x 8.6 x 8.4 cm; 219 g
Item model number	F-4oz
Manufacturer recommended age	3 years and up
Manufacturer	Applied Magnets
Country of Origin	USA
Item Weight	219 g

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