SDS Guide: 2-Butoxyethanol in Commercial Degreasers

2-Butoxyethanol (CAS 111-76-2, also labeled EGBE or butyl glycol) is the solvent that makes heavy-duty degreasers cut through baked-on grease on kitchen hoods, loading dock floors, and fryer stations. It works by breaking the surface tension between grease and water, letting the aqueous portion of the cleaner carry oils into suspension. That same solvent action is what makes it an inhalation and dermal concern once concentrations climb above trace levels.

Property	Value	Relevance to crews
OSHA PEL (8-hr TWA)	50 ppm (240 mg/m3)	Applies to General Industry Table Z-1; relevant for enclosed kitchen hood or mechanical room cleaning
ACGIH TLV-TWA	20 ppm, skin notation	Lower than the OSHA PEL — the skin notation means dermal absorption contributes meaningfully to total dose
NIOSH REL	5 ppm (24 mg/m3)	Far more conservative than OSHA PEL; some employers standardize to this figure voluntarily
Boiling point	171 C (340 F)	Low volatility relative to solvents like acetone, but vapor still accumulates in unventilated rooms
Typical use concentration	2 to 8 percent in RTU degreasers	Concentrate products may run higher before dilution

Source: OSHA Chemical Sampling Information — 2-Butoxyethanol; 29 CFR 1910.1000 Table Z-1.

Why the skin notation matters more than the airborne number

Most degreaser SDS Section 8 entries for this chemical flag a skin notation alongside the exposure limit. That notation exists because 2-butoxyethanol penetrates intact skin efficiently, and repeated bare-hand contact with concentrate — refilling spray bottles, wiping down a mixing station — can push a worker's total absorbed dose above what airborne monitoring alone would suggest. This is the reason nitrile gloves, not just ventilation, sit at the center of the PPE section for this chemical class rather than being an afterthought.

Reading Section 11 on a butoxyethanol-based degreaser SDS

Section 11 (toxicological information) on these SDSs typically lists hemolysis (red blood cell breakdown) as the primary systemic concern from high-dose exposure, based on animal studies, along with irritation to eyes and respiratory tract at lower exposure. Cleaning crews are not working anywhere near the doses used in those studies during normal use, but the data explains why manufacturers set the recommended use-dilution range rather than leaving it open-ended. Diluting below the labeled range does not just save product — it keeps airborne concentration and dermal contact well under the numbers in the table above.

Where this chemical shows up on a commercial account

• Kitchen hood and exhaust degreasing for restaurant and food-service accounts
• Heavy equipment and loading dock degreasing in industrial facility contracts
• Some glass and multi-surface cleaners at lower concentration as a co-solvent
• Graffiti and adhesive removers where it aids penetration of the target residue

Because it appears across several product categories at different concentrations, a facility's chemical inventory (the list required under 29 CFR 1910.1200(e)(1)) should track it by product, not assume "we don't use butoxyethanol" just because the branded degreaser name does not mention it. Section 3 of the SDS is where the actual ingredient shows up.

Ventilation and PPE guidance from Section 8

For enclosed-space use — walk-in coolers, mechanical rooms, small restrooms with hood-cleaning overspray — Section 8 entries commonly recommend mechanical ventilation sufficient to keep concentrations below the PEL, plus splash goggles and nitrile or neoprene gloves rated for organic solvents. Natural rubber latex gloves are a poor match for this chemical family; solvent permeation through latex happens faster than through nitrile at comparable thickness. A crew using a pressure washer with a heavy-duty degreaser injector should also check whether the aerosolized mist changes the exposure picture versus a spray-and-wipe application — aerosolization increases the effective airborne concentration even at the same dilution ratio.

Disposal and environmental notes from Sections 12 to 14

2-Butoxyethanol is not on the RCRA hazardous waste list at typical use-dilution concentrations, so rinse water from routine degreasing generally goes to sanitary sewer under local discharge rules, not hazardous waste disposal. Concentrate product that is out of date or off-spec is a different question — check Section 13 for the specific SDS language, since some formulations carry aquatic toxicity classifications that affect disposal guidance under local wastewater ordinances.

First-aid response by exposure route

Section 4 of most butoxyethanol-based degreaser SDSs breaks first aid into four exposure routes, and crews trained on only one route (usually skin, because that is the everyday nuisance exposure) often do not know the other three. For eye contact, the standard guidance is to flush with lukewarm water for 15 to 20 minutes, holding the eyelids open and rolling the eye to rinse behind the lid, then seek medical evaluation even if irritation seems to resolve, since corneal effects can lag the initial rinse. For skin contact, remove contaminated clothing immediately and wash the area with soap and water for at least 15 minutes; do not use solvent or degreaser to clean degreaser off skin, which just extends the contact window. For inhalation, move the affected person to fresh air right away and monitor for headache, dizziness, or nausea — symptoms that typically resolve within 30 to 60 minutes in fresh air but warrant a call to Poison Control (800-222-1222) if they persist or worsen. For ingestion, do not induce vomiting; rinse the mouth, provide water if the person is conscious and able to swallow, and get medical attention immediately, since aspiration into the lungs during vomiting is a bigger risk than the ingested dose itself for most glycol ether solvents at consumer product concentrations.

Storage compatibility and what not to store nearby

2-Butoxyethanol is combustible (not flammable) with a flash point around 67 C (152 F), which puts it in a lower fire-hazard category than acetone or IPA but does not eliminate storage precautions. Section 10 stability data on most SDSs flags strong oxidizers — concentrated bleach, peroxide-based products, chlorinated pool chemicals — as materials to keep on separate shelving, since oxidizer contact with organic solvents can accelerate degradation and, in a fire, intensify combustion. A mechanical room shelf that stacks a butoxyethanol degreaser next to a case of granular pool shock or strong oxidizer-based grout cleaner is a common inventory mistake on multi-service accounts; segregate acids, oxidizers, and combustible organic solvents onto separate shelves or use secondary containment trays so a leak from one container does not reach another product family.

Dilution-control workflow for RTU degreasers

Because labeled use-dilution for butoxyethanol degreasers commonly runs 2 to 8 percent, a crew mixing from concentrate should use a metered dilution station or a marked mixing pitcher rather than eyeballing a pour — a worker who free-pours "about a capful" into a spray bottle can easily land at double or triple the labeled concentration, which raises both the airborne vapor load in an enclosed kitchen hood plenum and the dermal absorption risk from splashback during application. Color-coded proportioning valves set to the manufacturer's dilution ratio (commonly expressed as 1:32 to 1:10 depending on the specific product) remove the guesswork and are cheap enough — typically $40 to $150 per station — that most healthcare and food-service accounts require them as a condition of the chemical safety plan, independent of whether OSHA specifically mandates the equipment.

Frequently asked questions

Is 2-butoxyethanol banned or being phased out? No federal ban exists. Some state VOC rules regulate it as a volatile organic compound in specific product categories, which affects formulation more than availability. Check the Opora VOC Compliance Lookup for state-specific limits before assuming a product is compliant everywhere.

What respirator, if any, is needed for routine hood degreasing? For well-ventilated routine use at labeled dilution, most SDSs do not require a respirator. For confined-space or high-concentration concentrate handling, an organic vapor cartridge respirator becomes appropriate — confirm against the specific product's Section 8 language rather than applying a blanket rule.

Does this chemical require a specific entry on the HazCom written program's chemical list? Yes, by product identifier matching the SDS and label, per 1910.1200(e)(1)(i) — list the branded degreaser product, not the generic chemical name, unless that is what appears on the container label.