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ASOSolv™ Regulatory & Waste Disposal Q&A
Answers to Common Compliance Questions About ASOSolv™
Flammability, hazardous waste classification, shipping requirements, and hazard statements for ASOSolv™ — straight from our technical team.
Laboratories evaluating ASOSolv™ often have questions about how the solvent should be handled, stored, shipped, and disposed of. This page answers the most common regulatory and safety questions we receive from labs, EHS teams, and waste management partners.
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A note on accuracy: This Q&A is intended to provide general guidance based on current regulatory information available at the time of publishing. Regulations vary by state and jurisdiction, and individual lab waste streams may be classified differently depending on use and mixture. Always consult your facility's EHS team and applicable state and local regulations before finalizing waste handling or disposal procedures.
120°C Flashpoint — not classified as flammable
pH 6.5 Near-neutral pH
Non-DOT Not regulated as hazardous material for shipping
W203 Form Code — non-halogenated solvent
Frequently Asked Questions
1 Is the solvent flammable?
No, ASOSolv™ is not flammable. A liquid is classified as flammable if its flashpoint is ≤93°C. ASOSolv™'s flashpoint is 120°C, placing it well outside the flammability threshold.
2 What are the EPA hazardous waste codes for identification of the solvent?
Unused solvent: When discarded as waste, unused ASOSolv™ will not carry any EPA hazardous waste codes and will not be classified as hazardous waste under 40 CFR Part 261.
Spent solvent: After mixing with other impurities or components — including oil samples, aqueous standards, organometallic standards, or other solvents — the spent solvent will carry at least the
Spent solvent: After mixing with other impurities or components — including oil samples, aqueous standards, organometallic standards, or other solvents — the spent solvent will carry at least the
F005hazardous waste code (F List, 40 CFR 261.31).
F003will not apply, even if mixed with xylene, acetone, ethyl acetate, ethyl benzene, ethyl ether, methyl isobutyl ketone, n-butyl alcohol, cyclohexanone, or methanol — unless the flashpoint of the final mixture drops below 60°C.- If the final spent solvent meets or exceeds maximum leachable concentration regulatory levels for any hazardous components listed in Table 1 (40 CFR 261.24), the applicable toxicity characteristic
Dcodes would also apply.
3 What will the Source Code and Form Code for the solvent waste stream be?
The Form Code will be
The Source Code will depend on the specific use of the solvent in your lab. For more information, visit the EPA RCRAInfo Nationally Defined Values sections in the Biennial Report Module covering Form Code and Source Code.
W203 (Concentrated non-halogenated, e.g. non-chlorinated, solvent). The Source Code will depend on the specific use of the solvent in your lab. For more information, visit the EPA RCRAInfo Nationally Defined Values sections in the Biennial Report Module covering Form Code and Source Code.
4 What are the hazardous components in the solvent?
- Isobutanol (CAS # 78-83-1) — 10–90%
- Ethyl Lactate (CAS # 97-64-3) — 10–90%
5 What is the UN Code for shipping the solvent?
ASOSolv™ does not require a UN Code for shipping, as it is not regulated as a hazardous material under DOT. See 49 CFR Subpart B for more information on the designation of hazardous materials.
For additional reference, the UNECE website provides the UN Model Regulations Rev. 23 (2023), reflecting the most recent revisions to the UN Model Regulations on the Transport of Dangerous Goods.
For additional reference, the UNECE website provides the UN Model Regulations Rev. 23 (2023), reflecting the most recent revisions to the UN Model Regulations on the Transport of Dangerous Goods.
6 Which Emergency Response Guide (ERG) Number should be used for the solvent?
An ERG number does not apply to unused ASOSolv™, since it is not classified as a DOT hazardous material. For general reference, the 2024 Emergency Response Guidebook is available to view or download.
7 What are the Hazard Statements associated with the solvent?
| H315 | Causes skin irritation |
| H319 | Causes serious eye irritation |
| H335 | May cause respiratory irritation |
| H336 | May cause drowsiness or dizziness |
8 What is the pH of the solvent?
ASOSolv™ has a pH of 6.5, making it near-neutral.
Have a Regulatory or Safety Question Not Answered Here?
Our technical team is available to help you navigate compliance, handling, and disposal questions specific to your laboratory's waste stream and jurisdiction.
Contact Technical Support Request a QuoteThis page is provided for general informational purposes only and does not constitute legal, regulatory, or safety advice. Refer to ASOSolv™'s Safety Data Sheet (SDS) and consult your facility's EHS team before making waste handling, storage, or disposal decisions.