What DOT Hazmat Class Are Solvents? Classes, UN Numbers, and Packing Groups

Most industrial solvents are DOT Hazard Class 3 (flammable liquids) — any liquid with a flash point at or below 60 °C (140 °F). Each solvent is assigned a UN identification number, a proper shipping name, and a Packing Group (I, II, or III) based on its flash point and boiling point, which together drive packaging, labeling, and shipping-paper requirements.

Here is how Class 3 works, how packing groups are assigned, the DOT profile of common solvents, and what you need to ship them compliantly.

What Is DOT Hazard Class 3?

The U.S. Department of Transportation organizes hazardous materials into nine hazard classes. Class 3 covers flammable liquids — liquids that give off ignitable vapor at or below 60 °C (140 °F) flash point. The large majority of the solvents RightPath distributes fall here: acetone, toluene, methanol, isopropanol, ethyl acetate, hexane, and more. A smaller number carry additional or different hazards (for example, methanol is also toxic, and strong acids are corrosive Class 8), which is why every shipment is governed by the entry in the DOT Hazardous Materials Table, not by the class alone.

How Are Solvents Assigned a Packing Group?

Within Class 3, the Packing Group signals how dangerous the liquid is to transport, set by flash point and initial boiling point:

The packing group in turn determines the performance level of the UN-rated container you must use (X for PG I, Y for PG II, Z for PG III packaging).

DOT Classifications for Common Solvents

Typical DOT profiles for solvents RightPath stocks. Always confirm the current entry against the DOT Hazardous Materials Table and the product Safety Data Sheet before shipping, because assignments can carry special provisions:

Which Solvents Carry More Than One Hazard?

Some flammable solvents have a subsidiary hazard that must also appear on labels and documentation. Methanol (UN1230), for example, is a flammable liquid with a subsidiary toxic (Class 6.1) hazard. Others may be flagged as marine pollutants. These extra designations change label, placard, and stowage requirements, so check the SDS Section 14 (Transport Information) for the complete picture.

What Do You Need to Ship Class 3 Solvents?

Compliant shipment of a flammable-liquid solvent generally requires: UN-rated packaging matched to the packing group; the correct proper shipping name, UN number, class, and packing group on the package; a Class 3 flammable-liquid label (and any subsidiary label); vehicle placarding at applicable quantities; and shipping papers or a bill of lading with the full basic description. A trained hazmat employee must prepare the shipment. For the governing federal rules, see the PHMSA Hazardous Materials Program and the Hazardous Materials Table at 49 CFR 172.101.

Grades and Sizes We Stock

RightPath Industries distributes Class 3 solvents — acetone, toluene, methanol, isopropanol, ethyl acetate, hexane, MEK, and more — in technical through high-purity analytical grades, packaged in 5-gallon pails, 55-gallon drums, 275- and 330-gallon IBC totes, and bulk tanker quantities. Every shipment moves in DOT-compliant, UN-rated packaging with a Certificate of Analysis and correct hazmat documentation. Browse the solvents category and our full product catalog.

How to Order Solvents from RightPath

Tell us the solvent, grade, volume, and destination, and RightPath handles grade selection, UN-rated packaging, labeling, placarding, and shipping papers so your flammable-liquid order arrives in full compliance. Request bulk pricing and we will quote it delivered.

Frequently Asked Questions

What hazard class is acetone for shipping?

Acetone is DOT Hazard Class 3 (flammable liquid), UN1090, Packing Group II. Confirm the current entry on the SDS and 49 CFR 172.101 before shipping.

Are all solvents Class 3 flammable liquids?

Most are, because they have a flash point at or below 140 °F, but not all. Some solvents carry subsidiary hazards (such as toxicity), and some liquids in the broader chemical catalog fall in other classes entirely.

What is a packing group in DOT hazmat?

The packing group (I, II, or III) rates transport danger within a class. For flammable liquids it is set by flash point and boiling point and determines the performance level of the UN-rated container required.

What is the flash point cutoff for a DOT flammable liquid?

A liquid with a flash point at or below 60 °C (140 °F) is a DOT Class 3 flammable liquid. Above that threshold it is generally not Class 3.

Where do I find the official DOT classification for a chemical?

Use the DOT Hazardous Materials Table at 49 CFR 172.101 and Section 14 of the product Safety Data Sheet, which lists the UN number, proper shipping name, class, and packing group.

How Much Does a Gallon of Acetone Weigh?

A US gallon of acetone weighs about 6.6 pounds (3.0 kg) at room temperature. Acetone’s density is roughly 0.791 g/mL at 20 °C, so one 3.785 L gallon holds about 2,994 g of liquid. The exact weight drops as temperature rises, because acetone expands and gets less dense when it warms.

Below is the full breakdown — weight by container size, the temperature effect, how acetone compares to water and other solvents, and how to order it in bulk from RightPath.

What Is the Density of Acetone?

Density is mass per unit volume, and it is what turns a volume you order (gallons, drums, totes) into the weight that shows up on a bill of lading. Acetone is lighter than water: water is 1.000 g/mL at 4 °C, while acetone sits near 0.79 g/mL. Reference density values for acetone (propan-2-one, CAS 67-64-1, PubChem CID 180):

The difference between a cool warehouse and a hot loading dock is small on a single gallon but real across a tanker load, which is why acetone is bought and sold by net weight at a reference temperature, not by loose volume.

How Much Does Acetone Weigh by Container Size?

Using 0.791 g/mL (20 °C) for the liquid, here is the approximate weight of acetone alone — not counting the drum, tote, or tanker — for the fill sizes RightPath ships:

Add container tare weight for shipping math: a steel 55-gallon drum adds roughly 40 lb empty, and a filled composite IBC tote of acetone runs well over a ton gross. For a self-serve number on any volume or temperature, use the RightPath density & volume-to-weight calculator.

Why Does Acetone Weigh Less Than Water?

Acetone molecules are relatively small and pack loosely because they interact mainly through weak dipole forces rather than the tight hydrogen-bond network that makes water dense. That lower density is the reason a gallon of acetone (about 6.6 lb) weighs roughly 1.7 lb less than a gallon of water (about 8.34 lb). It also means acetone floats on water and mixes with it fully in any ratio.

How Does Acetone Compare to Other Common Solvents?

Key Physical Data for Acetone

For the authoritative record on acetone’s identity and physical constants, see the PubChem entry for acetone (CID 180). Because acetone’s flash point is far below room temperature, always confirm current handling and storage requirements on the supplier Safety Data Sheet before use.

Grades and Sizes We Stock

RightPath Industries supplies acetone in technical, ACS/reagent, and high-purity analytical (including HPLC) grades. Standard fill sizes are 5-gallon pails, 55-gallon drums, 275- and 330-gallon IBC totes, and bulk tanker quantities. Certificates of Analysis ship with every lot, and grade selection depends on your application — general cleaning and degreasing versus analytical or pharmaceutical use. See the acetone product page and our full solvents category.

How to Order Acetone from RightPath

Tell us the grade, volume, and delivery location, and we quote packaged or bulk acetone with a Certificate of Analysis and DOT-compliant shipping. RightPath serves industrial, laboratory, and manufacturing buyers with drum, tote, and tanker fulfillment. Request bulk pricing and we will turn your volume into a delivered weight and price.

Frequently Asked Questions

How many pounds is a 55-gallon drum of acetone?

About 363 lb (165 kg) of acetone at 20 °C, before adding the drum’s own weight. A steel 55-gallon drum adds roughly 40 lb empty, so gross weight is near 400 lb.

Is acetone heavier or lighter than water?

Lighter. Acetone’s density (~0.791 g/mL) is below water’s (1.000 g/mL), so a gallon of acetone weighs about 6.6 lb versus 8.34 lb for water, and acetone floats on water.

How do you convert gallons of acetone to pounds?

Multiply gallons by density in pounds per gallon. At 20 °C acetone is about 6.6 lb/gal, so 100 gallons × 6.6 = 660 lb. Use a reference temperature for accuracy on large volumes.

Does temperature change how much a gallon of acetone weighs?

Yes. Acetone expands as it warms, so a gallon weighs slightly less at 25 °C (~6.55 lb) than at 15 °C (~6.63 lb). The effect is small per gallon but adds up across bulk shipments.

What is the density of acetone in kg/m³?

About 791 kg/m³ at 20 °C, equivalent to 0.791 g/mL or 0.791 g/cm³.

Choose a drum for hundreds of gallons, an IBC tote for a thousand-gallon-plus range, and bulk tanker delivery once you use several thousand gallons per order. A 55-gallon drum holds about 208 liters, a standard IBC tote holds 275 or 330 gallons (1,041–1,250 L), and bulk tank trucks deliver roughly 5,000–6,500 gallons at once. The right size depends on your usage rate, storage, handling equipment, and how fast you turn inventory.

What are the standard chemical container sizes?

Industrial chemicals move in a predictable ladder of container sizes. Knowing the standard volumes lets you match packaging to how much you actually consume before shelf life or storage becomes a problem.

When should you order drums?

Drums are the workhorse of chemical distribution. A 55-gallon drum is easy to store, moves with a drum dolly or forklift, and is simple to seal and track. Drums suit operations that consume up to a few hundred gallons a month or that need to keep several different chemicals on hand without dedicating a tank to each.

When does an IBC tote make sense?

Intermediate bulk containers (IBCs) consolidate roughly five drums into one pallet-footprint cube with a built-in valve for pumping. They cut handling labor, reduce the number of connections you break (fewer spill points), and store efficiently. Choose totes when a single chemical feeds a line continuously and you have a forklift or pallet jack plus the floor space and secondary containment.

When is bulk delivery the right call?

Once you are opening totes weekly, bulk tanker delivery into an on-site storage tank almost always lowers your per-gallon cost and your packaging waste. Bulk requires a permitted storage tank, secondary containment, and delivery scheduling, but it eliminates drum and tote handling entirely and is the standard for plant-scale consumption.

How much does a full container weigh?

Weight, not just volume, decides what your forklift and racking can handle. Net weight equals volume × density. Using acetone as a worked example (PubChem CID 180, molecular formula C₃H₆O, molecular weight 58.08 g/mol, density about 0.79 g/mL at 20°C), one US gallon weighs roughly 6.6 lb of product:

Add container tare weight for gross figures: a steel 55-gallon drum adds roughly 40–50 lb, and a filled IBC tote with its cage and pallet runs close to 2,000 lb gross for acetone. Every chemical differs because density differs — run your specific product through the RightPath density and volume-to-weight calculator to get exact net and gross weights before you order. Physical constants can be verified on PubChem.

What sizes does RightPath stock?

RightPath Industries supplies chemicals in pails, 55-gallon drums, 275- and 330-gallon IBC totes, and bulk tanker quantities, with UN-rated packaging where DOT hazmat regulations require it. Browse the solvents category for per-product pack options, or ask us about custom repackaging if you need a non-standard fill size.

How to order the right size from RightPath

Tell us your monthly usage, storage setup, and handling equipment and we will recommend the most cost-effective packaging — often stepping up from drums to totes or bulk pays for itself quickly. Request bulk pricing with your target chemical and volume and we will quote packaging, freight, and lead time together.

How does packaging size affect freight and shelf life?

Packaging choice changes more than unit price. Bulk and totes lower freight cost per gallon because you move more product per handling unit and per pallet position, and they cut the labor of handling and disposing of empty drums. But larger containers only pay off if you consume the material before its shelf life expires or before an opened container degrades — many solvents pick up moisture or oxidize once the seal is broken. Match order size to turnover: if a tote will sit half-used for six months, several sealed drums may be the smarter buy. Factor in disposal and return logistics too, since empty drums and reconditioned totes carry their own handling costs.

Frequently asked questions

How many gallons are in a chemical drum?

The industry-standard chemical drum holds 55 gallons (about 208 liters). Smaller 30-gallon and 20-liter (jerrican) sizes are also common for lower-volume or more hazardous products.

How many gallons does an IBC tote hold?

Standard IBC totes hold 275 gallons (1,041 L) or 330 gallons (1,250 L). One 275-gallon tote is roughly equivalent to five 55-gallon drums.

Is it cheaper to buy chemicals in totes or drums?

Per gallon, larger containers are almost always cheaper because they cut packaging and handling costs. Totes beat drums and bulk beats totes — provided you can use the volume before shelf life or storage limits become a problem.

Do I need special equipment to handle an IBC tote?

Yes. A filled tote weighs roughly a ton, so you need a forklift or pallet jack rated for the load, plus secondary containment and a pump or gravity-fed valve setup.

Can I get a custom fill size?

Yes. RightPath offers custom repackaging into non-standard sizes for many products. Contact us with your requirement and we will confirm feasibility and pricing.