Gaurab Chakrabarti

CEO @Solugen | MD/PhD building the modern chemical industry | Making molecules that power humanity | Takes on manufacturing, energy, molecules, and biology

[Gaurab Chakrabarti @Gaurab]

We spent $15,000 on billboards targeting one person: the guy controlling all the chemical spend at a saltwater disposal company in Texas. We mapped his commute and bought every billboard between his house and the oil field. When we finally called, he said "I see your billboards everywhere." That landed us our first oil field contract. At the time our entire operation was a $10,000 reactor built from PVC pipes from Home Depot, turning corn sugar into industrial chemicals. People keep trying to throw it away. It still works. That leaking reactor started a multibillion-dollar company. @ycombinator visited our plant in Houston. The original PVC reactor is still on the floor next to the Bioforge.

[Gaurab Chakrabarti @Gaurab]

Aluminum smelting is the most electricity-intensive process in manufacturing. Producing one ton requires 14,000 kWh, enough to power an American home for 16 months. The Hall-Héroult process, invented in 1886, dissolves alumina in a bath of molten cryolite at 960°C and passes 350,000 amps through it. The aluminum-oxygen bond is one of the strongest in industrial chemistry. A single smelter runs 24 hours a day for years between shutdowns. There are over 240 aluminum smelters worldwide. Together they consume 3.5% of global electricity each year. A typical electric vehicle contains 200 to 300 kg of aluminum. Aircraft fuselages, transmission lines, and server racks all depend on this process. China produces 60% of global supply. The US made 33% of the world's aluminum in 1980. Today it makes less than 1%.

[Gaurab Chakrabarti @Gaurab]

You cannot buy a new gas turbine until 2030. Order books at GE, Siemens, and Mitsubishi stretch to 2029. Turbine prices have nearly tripled since 2019. Every AI data center needs power and every gas plant needs a turbine. And every turbine has one part that bottlenecks the entire industry: The blade. It has to survive in gas 500°C above the melting point of the metal it's made from and spin at up to 20,000 RPM under 10,000 g of centrifugal force. Each blade is grown as a single crystal of nickel superalloy, pulled through a vacuum furnace at 3 mm per minute. A set of blades costs $600,000 and takes 90 weeks to grow. The same metallurgy powers modern jet engines. Only 3 companies on Earth can build one. China spent $42 billion trying to catch up. They bought a Russian fighter engine, took it apart, and copied every part. Their copy ran 30 hours between overhauls versus 400 for the original. Modern Western engines run 4,000. You can reverse engineer the shape of a turbine blade. You cannot reverse engineer 60 years of metallurgy.

[Gaurab Chakrabarti @Gaurab]

@MissAnhthu @Dyson Dyson has mastered rotating equipment

[Gaurab Chakrabarti @Gaurab]

@DeltaClimbs @jared_western @ryjlocal @Wild_Arms_RandD @dkrajendra @williewockets Happy to chat!

[Gaurab Chakrabarti @Gaurab]

Boeing pumps nitrogen into every 787 Dreamliner wing. Not for pressure. To prevent explosions. It is called OBIGGS. Cabin air is forced through hollow fiber membranes at high pressure. Oxygen slips through the membrane walls faster than nitrogen. The nitrogen-enriched air fills the fuel tank ullage space as fuel is burned. Below 12% oxygen, jet fuel vapor cannot ignite. The 787 was the first commercial aircraft to inert all wing fuel tanks continuously from takeoff to landing. TWA Flight 800 exploded in 1996 when fuel vapors in the center wing tank ignited. 230 people died. The FAA mandated fuel tank inerting for all new aircraft in 2008. Boeing solved it with a membrane thinner than a sheet of paper and a gas that makes up 78% of the air you are breathing right now.

[Gaurab Chakrabarti @Gaurab]

@ByteFuserUK I remember hearing about a company using aluminum as an energy carrier for on-site generation of energy. They could “recharge” it like a battery

[Gaurab Chakrabarti @Gaurab]

Aluminum smelting is the most electricity-intensive process in manufacturing. Producing one ton requires 14,000 kWh, enough to power an American home for 16 months. The Hall-Héroult process, invented in 1886, dissolves alumina in a bath of molten cryolite at 960°C and passes 350,000 amps through it. The aluminum-oxygen bond is one of the strongest in industrial chemistry. A single smelter runs 24 hours a day for years between shutdowns. There are over 240 aluminum smelters worldwide. Together they consume 3.5% of global electricity each year. A typical electric vehicle contains 200 to 300 kg of aluminum. Aircraft fuselages, transmission lines, and server racks all depend on this process. China produces 60% of global supply. The US made 33% of the world's aluminum in 1980. Today it makes less than 1%.

[Gaurab Chakrabarti @Gaurab]

@zanehengsperger Have y'all tried partnering with local community colleges? In houston this ended up being very good tool for us: https://t.co/WRBjZOUG0v

[Gaurab Chakrabarti @Gaurab]

@bifrosty2k Luke was in my YC class back in W17. The idea is crazy and it might actually work.

[Gaurab Chakrabarti @Gaurab]

The chemicals industry first punched a hole in the ozone layer and then fixed it. It all started in 1928 when a GM engineer named Thomas Midgley invented Freon to replace refrigerants that had been killing people. The compound went into every refrigerator and aerosol can on Earth. By 1985, British scientists had mapped the hole over Antarctica. Two years later, 46 nations signed the Montreal Protocol. Every UN member state eventually followed. The only environmental treaty in history to do so. Each country phased out CFCs on a coordinated global timeline. The same companies that had made the original CFCs, DuPont, ICI, and Allied-Signal, eventually developed the replacements that took their place. Atmospheric CFC levels peaked in 1994 and have been falling ever since. In March, an MIT study confirmed the Antarctic ozone hole could fully close by 2035. The author was Susan Solomon, the same chemist who first explained the hole in 1986.

Kristin tells this story in her new essay and makes the case for the builders. She was one of our early investors at Solugen, where we use biology to make industrial chemicals from corn sugar instead of petroleum. Building beats yelling at clouds.

[whimsy lohan (in NYC) @SexyLikeMeiosis]

Climate activists have spent decades shutting down nuclear, blocking clean energy transmission, and trying to ban research on cooling the planet... but the movement that wins the next century will be led by the people doing the work, not those protesting it. New essay out today👇

[Gaurab Chakrabarti @Gaurab]

This should be a national security level concern

[Jason Kelly @jrkelly]

Great article in @statnews by @damiangarde today covering schism in the biotech industry over the rise of Chinese biotech industry - notably no one will go on record but me😛

The US can easily stop the Chinese biotech industry whenever it chooses as the US consumer is responsible for 70% (!!!) of the drug industry profits. Thus the US gets to set the rules.

It is a mistake to outsource this industry -- very simply: the technology of genetic engineering is a matter of national security and democracies should lead it. We would not feel good if the US wasn't leading AI today and trust me we will feel even worse if we are behind in genetic engineering in the future as the tech improves.

If you talk to people privately in biotech they will say it's a Prisoner's dilemma where they wish the rules would change. If the rules stay as they are then to stay competitive venture capitalists need to move their $ to China and pharma companies need to buy their drug assets from Chinese startups instead of from startups in Kendall Square or South San Francisco (the current US hubs for drug discovery).

To fix this we should take two approaches:

(1) Offensive - make US biotech industry more competitive!
* Reform phase 1 clinical trails in US to be as fast as China and Australia -- this is in progress now at @US_FDA . @DrSynbio congressional testimony on this was very helpful. (link below).
* Replace manual laboratories with autonomous robotic laboratories via programs like NSF Cloud Labs program and @SenToddYoung 's Cloud Lab Bill so US scientists can compete with lower-cost scientific labor in China. Yes, @ginkgo is the leader in making this tech. Efforts from @WHOSTP44. @dariogila, @mkratsios47, @sriramk with the WH Genesis Mission are a big help here.
* Fix our approach to biotech patents -- it is very easy for Chinese startups to fast-follow US companies that have scientific breakthroughs by easily working around patents, @john_evans3 has led in thinking here.

(2) Defensive - slow the rise of the biotechnology industry in China
* USG should add biotechnology to the COINS Act list of strategic technologies alongside AI, Quantum, Semiconductors, and Drones to prevent US investment from speeding Chinese development.
* Other tools can be used in the future to easily penalize drug assets that originate from startups in China -- can do via regulatory pathway or via Medicare reimbursement.

Genetic engineering is the most important technology to the future of humanity. Democracies should not give up on it! Let's fight for it!

[Jason Kelly @jrkelly]

Great article in @statnews by @damiangarde today covering schism in the biotech industry over the rise of Chinese biotech industry - notably no one will go on record but me😛

The US can easily stop the Chinese biotech industry whenever it chooses as the US consumer is responsible for 70% (!!!) of the drug industry profits. Thus the US gets to set the rules.

It is a mistake to outsource this industry -- very simply: the technology of genetic engineering is a matter of national security and democracies should lead it. We would not feel good if the US wasn't leading AI today and trust me we will feel even worse if we are behind in genetic engineering in the future as the tech improves.

If you talk to people privately in biotech they will say it's a Prisoner's dilemma where they wish the rules would change. If the rules stay as they are then to stay competitive venture capitalists need to move their $ to China and pharma companies need to buy their drug assets from Chinese startups instead of from startups in Kendall Square or South San Francisco (the current US hubs for drug discovery).

To fix this we should take two approaches:

(1) Offensive - make US biotech industry more competitive!
* Reform phase 1 clinical trails in US to be as fast as China and Australia -- this is in progress now at @US_FDA . @DrSynbio congressional testimony on this was very helpful. (link below).
* Replace manual laboratories with autonomous robotic laboratories via programs like NSF Cloud Labs program and @SenToddYoung 's Cloud Lab Bill so US scientists can compete with lower-cost scientific labor in China. Yes, @ginkgo is the leader in making this tech. Efforts from @WHOSTP44. @dariogila, @mkratsios47, @sriramk with the WH Genesis Mission are a big help here.
* Fix our approach to biotech patents -- it is very easy for Chinese startups to fast-follow US companies that have scientific breakthroughs by easily working around patents, @john_evans3 has led in thinking here.

(2) Defensive - slow the rise of the biotechnology industry in China
* USG should add biotechnology to the COINS Act list of strategic technologies alongside AI, Quantum, Semiconductors, and Drones to prevent US investment from speeding Chinese development.
* Other tools can be used in the future to easily penalize drug assets that originate from startups in China -- can do via regulatory pathway or via Medicare reimbursement.

Genetic engineering is the most important technology to the future of humanity. Democracies should not give up on it! Let's fight for it!

[Gaurab Chakrabarti @Gaurab]

@datarade I know...we just don't like admitting it

[Gaurab Chakrabarti @Gaurab]

China builds 120 J-20 stealth fighters a year. Every one needs rhenium-bearing superalloy blades. Beijing is quietly removing the rhenium constraint that has historically capped every modern air force. In 2023, China overtook the US as Chile's largest rhenium buyer. In 2024, domestic production quadrupled from 5.3 to 20 tonnes and held steady since. WS-15 serial production hit the J-20A line in December 2025. The domestic ramp came from roaster retrofits and new recovery equipment at Jiangxi Copper, China Molybdenum, and Zijin Mining. Beijing stockpiles rhenium at about 10 tonnes a year, a surge buffer for combat attrition. The same metallurgy feeds the J-20, J-35, CJ-1000A, gas turbines for grid power, and Pt-Re refinery catalysts. Every tonne Beijing locks in is one fewer for an F135 blade at Pratt & Whitney, an F414 stage at GE, or a Trent XWB rotor at Rolls-Royce. By 2030, China's fifth-generation fighter fleet will outnumber the US Air Force's F-22 and F-35A combined. The rhenium constraint isn't going away. It's becoming binding only on the West.

[Gaurab Chakrabarti @Gaurab]

Jensen says AI needs 1000x more energy. Musk says solar-powered AI in orbit is the only way. Solar is built on a chemical the US stopped making at scale. China produced 93.5% of the world's polysilicon in 2024. 95% for solar-grade material. Silicon is the second most abundant element in Earth's crust. The bottleneck is chemical purification. The best solar cells need silicon refined to 99.9999999%. Getting there means turning silicon into trichlorosilane, a liquid that boils at 31.8°C. Boron and phosphorus impurities boil at nearly the same temperature. Separating them takes hundreds of distillation stages. Then the silicon deposits onto seed rods at 1,100°C. We manufacture chemicals. A polysilicon plant takes 10 years to build and qualify in the West. China's capacity hit 3.25 million metric tons by the end of 2024. Everywhere else on Earth combined is about 200,000 metric tons. China built a 16-to-1 gap over the last fifteen years. The US has two solar-grade producers left. Hemlock in Michigan and Wacker in Tennessee. REC Silicon restarted its Moses Lake plant in 2024, failed to hit purity spec, and shut it down four months later. Owning the chemistry is the only way.

[Elon Musk @elonmusk]

@TheChiefNerd Space is the only way

[Gaurab Chakrabarti @Gaurab]

Buy black market peptides and you might not even get the right molecule. This vial said retatrutide, but the lab test exposed it as tirzepatide. We manufacture chemicals. You don't "accidentally" make a different drug. A failed synthesis yields a flawed version of your target, not a clean copy of something else. Retatrutide and tirzepatide have entirely different sequences. This is a substitution. Why? Retatrutide is investigational, which keeps it scarce and expensive. Tirzepatide sells in bulk for a fraction of that. Last month The New Yorker tested gray-market peptide vials and found endotoxins and severe under-dosing. Partnership for Safe Medicines audited FDA records over a 16-month window: 2,465 semaglutide and tirzepatide shipments, 239 from unregistered sellers. The FDA stopped 44. 195 reached the US anyway. When nobody's liable for the molecule, the label is just a pretty sticker.

[Krysia @Krysia830073]

We have another kit with yet another new label that testing has shown tirzepatide not Reta. Someone called Yula is the vendor.

[Gaurab Chakrabarti @Gaurab]

@HealthRanger It wasn't. My post said: "The chemistry works. Casting yield at production scale does not." China will close it, but they haven't yet.

[Gaurab Chakrabarti @Gaurab]

Over 300 Chinese J-20 stealth fighters have been built at roughly $110 million each. Not one carries a turbine blade that matches the service life of its Western equivalent. The WS-15 reached serial production on the J-20A in December 2025. Its high-pressure turbine runs on a third-generation Chinese single-crystal superalloy, rated about 30 degrees Celsius hotter than the second generation. The chemistry works. Casting yield at production scale does not. Chinese foundries scrap two of every three blades they cast. Western foundries scrap one in twenty. Chinese military engines improved from a few hundred hours between overhauls to roughly 1,500 with better blades. Western equivalents run roughly twice as long between overhauls and several times longer in total service life. Western foundries target sulfur below 1 part per million. Best practice runs below 0.3. At that purity, the coating survives thousands of hours in gas streams hotter than the alloy's melting point. A few extra parts per million and the coating peels, the blade oxidizes, and the engine fails prematurely.

[Gaurab Chakrabarti @Gaurab]

Eli Lilly makes tirzepatide with a DEA List I controlled chemical, a Group 2A carcinogen, and a PFAS forever chemical. Novo Nordisk uses yeast. Novo's Ozempic backbone is fermented at their patent-protected plant in Kalundborg, Denmark. Tirzepatide and the synthetic GLP-1s are made via solid-phase peptide synthesis of fragments, then coupled in solution. Each cycle of deprotection uses piperidine, controlled by the DEA under Code 2704. It is the core of fentanyl. Each tirzepatide takes roughly 38 piperidine cycles across its fragments. Every SPPS step uses dimethylformamide as the solvent. DMF's residual limit was set at 880 ppm in 1997. The IARC reclassified it as a probable carcinogen in 2018, but the limit hasn't changed. Cleavage uses trifluoroacetic acid, a forever chemical. There is no harmonized regulatory limit for it. Toxicology data is too limited to set a safe daily dose. Approved drugs pass the specs. Every synthetic GLP-1 is made with these chemicals. One kilogram of API generates roughly twelve thousand liters of solvent waste. Novo built the modern route. Everyone else is stuck in 1997. Tens of millions take GLP-1 every week. We engineer enzymes to manufacture chemicals. Developing a yeast in the lab is not the same as running it in production. Novo has fermented GLP-1 peptides at industrial scale since 2010.