Chemical tanker · Malta flag · built 2006
IRENE DP: CO₂ emissions 2018–2025
IMO 9354571 EU ETS8 reporting years
- CO₂ reported 2025
- 6,404 t
- Fuel burned
- 2,030 t
- Distance
- 42,843 nm
- Time at sea
- 4,340 h
- Emitted at berth
- 9% of total
- Share of year under way
- 50%
- Gross tonnage
- 5,303
IRENE DP against its type
Built in 2006, it is 4 years older than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 5,303 gross tonnage it is smaller than 97% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 218 chemical tankers here under the Malta flag, 9.3% of the 2,344 on the register. Its MRV returns name it SICHEM AMETHYST for 2018–2020, IRENE DP for 2021–2022, NQ VIOLA for 2023–2024 and VIOLETA THERESA for 2025. The returns for 2018–2025 all give Valletta as port of registry.
Its 6,404 t of CO₂ for 2025 is 16% above the median of 5,533 t among the 1,483 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 149.5 kg CO₂, 40% below the type median of 250.2 kg. It logged 4,340 hours at sea against a median of 2,109 hours for its type that year. 9.2% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 8 years with reported emissions, the highest was 2023 (8,203 t) and the lowest 2025 (6,404 t). Its efficiency percentile within the type went from 87 in 2018 to 95 in 2025 (lower is more efficient). Of the 5 comparable vessels listed below with a 2025 return, 2 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 6,404 | 2,030 | 42,843 | 4,340 | 587 | 149.5 | 43.3 | 95 |
| 2024 | 7,383 | 2,339 | 40,857 | 4,365 | 664 | 180.7 | 45.6 | 94 |
| 2023 | 8,203 | 2,601 | 49,570 | 4,557 | 1,054 | 165.5 | 39.8 | 91 |
| 2022 | 7,057 | 2,240 | 43,654 | 4,348 | 797 | 161.7 | 38.4 | 91 |
| 2021 | 6,500 | 2,060 | 41,243 | 4,663 | 653 | 157.6 | 38.6 | 91 |
| 2020 | 7,651 | 2,422 | 45,945 | 4,286 | 1,284 | 166.5 | 38.5 | 90 |
| 2019 | 7,626 | 2,422 | 45,195 | 4,104 | 1,355 | 168.7 | 36.6 | 89 |
| 2018 | 8,069 | 2,563 | 45,788 | 6,021 | 869 | 176.2 | 35.6 | 87 |
Vessel particulars
- IMO number
- 9354571
- Previously reported as
- SICHEM AMETHYST, NQ VIOLA, VIOLETA THERESA
- Ship type
- Chemical tanker
- Gross tonnage
- 5,303
- Length overall
- 115.0 m
- Year built
- 2006
- Flag state
- Malta per EU MRV 2025
- Port of registry
- Valletta MRV 2025
- Technical efficiency (design)
- EEXI (13.6 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-02-12
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 1,277 of 1,348 qualifying chemical tankers by EEOI, at the 95th percentile. The dashed line is the type median, 14.4; this vessel reported 43.3.
EEOI divides emissions by transport work, which for this vessel and year was 148,027,739 tonne-miles over 42,843 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 20.6% lower than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 13.3% while distance sailed rose 4.9%and CO₂ per nautical mile fell 17.3%.That points mainly to how efficiently it sailed, rather than the other.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 6,503 t
- Methane (CH₄)
- 0.10 t
- Nitrous oxide (N₂O)
- 0.37 t
- Under EU ETS
- 5,316 t, 83% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | Lloyd's Register Quality Assurance Ltd | United Kingdom |
| 2020 | HELLENIC LLOYD'S S.A. | Greece |
| 2021 | RINA Services Spa | Italy |
| 2022 | DNV | Germany |
A change of verifier is not in itself a sign of anything being wrong.
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2018–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 8 MRV reporting years, an efficiency ranking, 4 of 5 vessel particulars and a name history. Not found in the sources for this vessel: AIS movements in Norwegian waters, 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.