Last January, I found myself standing in our receiving bay with a maintenance supervisor and a 5-gallon drum we had no business ordering. The drum was labeled sulfuric acid. The issue wasn't the acid—it was what the supplier had written on the packing list: "for general metal cleaning." That vague phrase triggered a week of phone calls, MSDS checks, and one very awkward conversation with our safety officer.
I'm the office administrator for a 150-person specialty fabrication company. I handle purchasing across three locations—roughly $400,000 a year across maybe 25 vendors. I took over this role in 2020, and since then I've ordered everything from toner cartridges to epoxy resins. This story is about how one chemical order changed the way I think about procurement.
The order that started it
One of our technicians asked me to quote "nitric acid and alcohol" for a cleaning step. I'll be honest: my first thought was, "That's not a thing, is it?" It sounded like a lab experiment, not a production material.
After about 30 minutes of searching, I learned two things. First, nitric acid is used for passivating stainless steel. Second, "alcohol" in a shop context usually means isopropyl alcohol, which is used for degreasing. Both are common. The problem is the phrase "nitric acid and alcohol" if you're not careful with it—if someone means mixing them, that's a serious safety issue. Nitric acid and alcohol can react violently, and the reaction can create explosive compounds. We don't mix them. We keep them in separate storage cabinets. But the request made me realize how many people use chemical names casually without thinking about compatibility.
The sulfuric acid question
The same week, a different supervisor asked: "Can sulfuric acid dissolve metal?" He wasn't trying to be funny. He had seen a YouTube video where sulfuric acid ate through a steel bolt, and he wanted to know if it was safe to use on our aluminum parts.
Here's what I found after reading the safety data sheet and checking a few reliable sources: yes, sulfuric acid can dissolve metal, but it depends on the metal, the concentration, and the temperature. Dilute sulfuric acid attacks iron and creates hydrogen gas. Concentrated sulfuric acid is more complicated—at room temperature, it can passivate some steels, but hot concentrated sulfuric acid is extremely aggressive. Aluminum and zinc are generally not compatible. So the short answer is "yes," and the better answer is "not on aluminum parts, and not without knowing exactly what you're doing."
That conversation made me realize how much of my job is actually translation. The maintenance guy doesn't need a chemistry lecture. He needs a straightforward compatibility chart, a proper container, and a supplier who can provide documentation without me chasing it for a week.
What this has to do with Mitsubishi Chemical
Once I started digging into material suppliers, the name Mitsubishi Chemical kept showing up. We use carbon fiber prepreg for a few composite parts, and our engineer told me that Mitsubishi Chemical is a name in the carbon fiber world. When I searched for "mitsubishi chemical carbon fiber Boeing," I found a lot of coverage about aerospace composites used in programs like the Boeing 787. I can't verify the current contract list, but it's clear they're not just a commodity chemical vendor.
I also learned not to confuse Mitsubishi Chemical with Mitsubishi Gas Chemical Company. They're separate companies. I mention this because I made exactly that mistake on a call, and the sales engineer politely corrected me. For someone in procurement, that kind of distinction matters when you're checking an SDS or verifying a hazardous material authorization.
And if you're ordering resins or coatings, the type of paints matters as much as the color.
The paint detail that almost got us
We needed an industrial coating for some steel frames. I told the supplier, "It's just paint." The supplier asked, "What type of paints?"—meaning what resin system. Epoxy? Polyurethane? Acrylic? Each one has different solvents, cure times, and resistance profiles. I didn't know that. I only knew the RAL number. I want to say it was 7016, but don't quote me on that.
The supplier was patient. They asked if the part would see chemicals or UV light. They asked if it needed to be recoated fast. They asked if the painter would spray or brush. That is when I understood: the specification isn't a nice-to-have. It's the whole order. A $200 drum of paint can turn into a $6,000 rework problem if you choose the wrong type of paint.
We ended up with a two-part epoxy that was way more than we needed for the first batch. But it meant we didn't have to redo the frames. I'll take that trade-off.
What I learned after 150 orders
It took me three years and about 150 orders to understand something that sounds obvious now: vendor relationships matter more than vendor lists. You can have a great catalog of materials, but if the supplier can't produce an accurate invoice, a valid SDS, or a recognizable lot number, you're not buying a material. You're buying a problem.
People think expensive chemical suppliers deliver better quality. Actually, suppliers who invest in compliance and documentation can charge more. The causation runs the other way. Their price covers a system that prevents fires, injuries, and rejected expense reports. I learned that the hard way in 2022, when a low-cost supplier sent a handwritten receipt for 120 liters of solvent. Finance rejected it, I ate the cost, and I had to explain to my VP why we had no auditable purchase record.
The industry has changed too. What was best practice in 2020 may not apply in 2025. Environmental regulations around chemical storage and reporting have tightened, and more suppliers are moving to online ordering systems with automatic SDS links. Switching to an online ordering system saved our accounting team maybe six hours a month. But the fundamentals haven't changed: know what you're buying, verify who you're buying it from, and keep the paperwork clean.
A few rules I now buy by
If you're new to buying chemicals or industrial materials, here's what I'd tell you:
- Don't order from a supplier who can't send a proper invoice. Handwritten receipts are a red flag.
- Ask for the safety data sheet before you ask for the price. If they hesitate, find another supplier.
- Learn the difference between resin types. "Paint" is not a spec. Your supplier needs to know the surface prep, film thickness, and exposure conditions.
- Keep nitric acid and alcohol in separate storage cabinets. Also, don't mix them in any waste container.
- When someone asks "can sulfuric acid dissolve metal?" the answer is yes in many cases, but the real answer is "check compatibility with your specific metal and concentration."
- Don't assume Mitsubishi Chemical and Mitsubishi Gas Chemical Company are the same. They're not.
Final thought
Procurement is basically risk management dressed up as purchasing. The materials themselves are just the beginning. The documentation, the safety data, the transport regulations, the storage requirements—that's where the real work is. If you're an admin like me, don't be embarrassed to ask questions. The worst purchase I ever made was the one I was too busy to question.