Chemical tanker · Liberia flag · built 2008
MAZU XIAO: CO₂ emissions 2023–2025
IMO 9503940 EU ETS3 reporting years
- CO₂ reported 2025
- 2,014 t
- Fuel burned
- 631 t
- Time at sea
- 1,992 h
- Emitted at berth
- 5% of total
- Share of year under way
- 23%
- Gross tonnage
- 5,001
MAZU XIAO against its type
Built in 2008, it is 2 years older than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 5,001 gross tonnage it is smaller than 100% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 402 chemical tankers here under the Liberia flag, 17.2% of the 2,344 on the register. The returns for 2023–2025 all give Monrovia as port of registry.
Its 2,014 t of CO₂ for 2025 is 64% below the median of 5,533 t among the 1,483 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 126.2 kg CO₂, 50% below the type median of 250.2 kg. It logged 1,992 hours at sea against a median of 2,109 hours for its type that year. 5.2% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 3 years with reported emissions, the highest was 2025 (2,014 t) and the lowest 2023 (1,236 t). Of the 4 comparable vessels listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2023–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 2,014 | 631 | — | 1,992 | 105 | 126.2 | 31.4 | not ranked |
| 2024 | 1,915 | 598 | 18,929 | 2,660 | 87 | 101.2 | 31.4 | 82 |
| 2023 | 1,236 | 386 | — | 1,488 | 22 | 111.0 | 42.6 | not ranked |
Vessel particulars
- IMO number
- 9503940
- Ship type
- Chemical tanker
- Gross tonnage
- 5,001
- Length overall
- 118.0 m
- Year built
- 2008
- Flag state
- Liberia per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Panama. The flag shown is from the newest official source, the EU MRV return for 2025. - Port of registry
- Monrovia MRV 2025
- Home port
- Monrovia
- Technical efficiency (design)
- EEXI (14.71 gCO₂/t·nm)
- Efficiency ranking
- Not ranked: transport work below the floor (2025)
- Verifier
- Bureau Veritas Certification France, France
- Accreditation
- 3-2047 rev. 4
- Compliance document issued
- 2026-03-18
- Compliance document expires
- 2027-06-30
Reported CO₂ by year
Reported CO₂ in 2025 was 62.9% higher than in 2023, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 5.2% and CO₂ per nautical mile rose 24.7%.Distance is missing for at least one of the two years, so activity and efficiency cannot be separated here.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 2,045 t
- Methane (CH₄)
- 0.03 t
- Nitrous oxide (N₂O)
- 0.11 t
- Under EU ETS
- 1,151 t, 57% of total
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2023–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 3 MRV reporting years and 4 of 5 vessel particulars. Not found in the sources for this vessel: an efficiency ranking, AIS movements in Norwegian waters, a name history, a licensed photograph, a sanctions listing and US port state inspections.
Empty means unreported, never zero. How EEOI, distance, percentiles and sister ships are handled is explained under reading a vessel page. Something wrong? See corrections.