TMC 3500 npb (n-Propyl Bromide) – TMC Industries, Inc.

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TMC 3500 npb (n-Propyl Bromide)

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TMC 3500 is the same as TMC 3000, but TMC 3500 has a small percentage of alcohol to better dissolve ionic soils, like flux and salts.

TMC-3500 is the perfect direct replacement for TCE, Perchloroethylene, 1,1,1-Trichloroethane, HCFC-141b, Freon and other hazardous or discontinued vapor- degreasing, ultrasonic and manual cleaning solvents. TMC-3500 was developed to not only remove rosin flux, no-clean flux, oil, grease, and wax contaminants, but also to remove residual halide salts, ions and other polar contaminants that often result in component failures. TMC-3500 is a patented azeotropic mixture that can be distilled and reused through numerous cycles before it needs to be replaced. Although TMC Industries offers stabilizer booster in 5-gallon pails, the synergistic action of TMC-3500 patented stabilizer package typically precludes the need to ever add stabilizers to maintain the integrity of the solvent through normal use.

The principal component of TMC-3500, n-Propyl Bromide, is currently classified as a 100% Volatile Organic Compound (VOC). The U.S. EPA has approved n-Propyl Bromide under the Significant New Alternatives Policy (SNAP) as a suitable replacement for ozone-depleting chemicals. N-Propyl Bromide has been shown to neither deplete the ozone layer nor contribute significantly to global warming.


The following are recommended settings for temperature and safety sensors on a typical vapor degreaser using TMC-3500. Certain features are optional and may not be present on a particular piece of equipment. Refer to the vapor-degreaser manual from the equipment manufacturer and the “Vapor-Degreaser Settings” document is available for download at for more technical information.

Refrigeration Thermostat (RT)

7°C /45°F

Safety Vapor Control (SVC)


High Temperature Control (HTC)


Liquid Temperature Control/Sensor (LTC/LTS)


Vapor Up Thermostat (VU/TH)



Prior to charging a piece of equipment with TMC-3500, the equipment should be thoroughly cleaned and neutralized according to the procedure listed in. After the equipment is up and running with TMC-3500, the acid acceptance levels of the solvent should be monitored on a regular basis with an Acid Acceptance Test Kit, available from TMC Industries. TMC-3500 can be distilled and reused through numerous cycles before losing its capacity to neutralize acid residues. If acid acceptance levels ever reach 29 drops or greater (<0.10% NaOH by weight), remove the solvent from the tank and replace it with virgin TMC-3500.


Boiling Point (°C / °F)


Specific Gravity @ 75°F (H2O=1)


Flash Point TCC (°C)


Base material meets ASTM-D 6368


Flammability Limits (vol. %) based on n-Propyl Bromide

3.8 - 9.5 %

Vapor Pressure @ 25°C (mm Hg)


Vapor Density (Air = 1)


Evaporation Rate (Butyl Acetate = 1)


Specific Heat @ 25°C (cal/g)


Dielectric Strength (AC Volts)



Clear & free of suspended matter

Cleaning, Corrosivity, Residue

Kauri Butanol Number


Corrosion of Metals

Does not corrode carbon steel, copper, stainless steel, aluminum, magnesium, or titanium.

Acid Acceptance, as NaOH (wt. % min.)


Free Halogen

Passes Test

Non-Volatile Residue (ppm / wt. % max.)

10 / 0.0010

Acidity, as HCL (wt. % max.)


Water (wt. % max.)



Shipping Policy

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

Shipping Time -- Most orders received before 3:00PM Central Time will ship the same day, provided the product ordered is in stock. Most orders received after 3:00 PM will ship the next business day. Orders are not processed or shipped on Saturday, Sunday or major US holidays.

We cannot guarantee when an order will arrive. Consider any shipping or transit time offered to you by the carrier as an estimate. We encourage you to order in a timely fashion to avoid delays caused by shipping or product availability.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

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