Letter Regarding denaturants to be used while denaturing ethanol used for blending in vehicle fuel.

Issued

01 Apr 2026

Source

State Excise Website

Category

Excise Page Pdf

What This Document Says

Gazette Reference: Letter No. (reference partially legible from Marathi text), Maharashtra State Excise Department, Mumbai Type: Administrative Letter / Circular — Denaturant Specification for Ethanol used in Vehicle Fuel Blending Authority: Maharashtra Prohibition Act (Bombay Prohibition Act, 1949) — State Excise Department

FORMAT B: NON-FEE AMENDMENT

Amended Rule/Section: Administrative directive under the Maharashtra State Excise Department regarding denaturing specifications for ethanol used in fuel blending

Type of Change: New Notification / Clarificatory Circular

What Changed: This is an official letter/circular issued by the Maharashtra State Excise Commissioner's Office, Mumbai, addressed to field excise officers and concerned authorities. The circular deals with the specification of denaturants to be used when denaturing ethanol intended for blending in vehicle fuel (petrol/diesel blending programme). Specifically, the circular addresses concerns regarding the use of Crotonaldehyde (क्रोटोनाल्डिहाइड / Crotonaldehyde) as a denaturant in ethanol. The letter references prior correspondence and circulars (including references dated around 2014–2015) and appears to clarify or revise the approved denaturant formula, indicating that Crotonaldehyde should not be used (or its use is being restricted/replaced) in the denaturing process for fuel-grade ethanol.

Key Details:

Subject: Denaturants to be used while denaturing ethanol used for blending in vehicle fuel

मराठी अनुवाद (Marathi Translation)

क्रोटोनाल्डिहाइड / क्रोटोनाल्डिहाइड) —

Specific chemical addressed: Crotonaldehyde (क्रोटोनाल्डिहाइड) — its suitability/approval as a denaturant is being reviewed or restricted

Prior references cited:

Reference No. approx. R.92.01 dated 2019
Circular reference approx. No. Furi/3lTlet/whfd dated 20.01.2015
Circular dated 29.01.2015 (ethanol denaturing related)
Circular approx. dated 19.02.2019
Addressees include:
1. Deputy Commissioner of State Excise (various divisions)
2. Superintendent of State Excise
3. District Collectors/relevant officers
4. Officers dealing with distillery/rectified spirit/fuel ethanol
5. Direction: Field officers are directed to ensure compliance with the revised/clarified denaturing specifications; the use of Crotonaldehyde as a denaturant in fuel-blending ethanol is flagged, and officers are instructed to act accordingly and report compliance
6. Context: This relates to the national ethanol blending programme (EBP) wherein ethanol is mixed with petrol; denaturing ensures it cannot be diverted for potable use

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मराठीत सारांश

# महाराष्ट्र दारूबंदी कायद्यातील डिनेचर्ड स्पिरिट संबंधी notification

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## थोडक्यात:
**उत्पादन शुल्क विभागाने गाडीतील इंधन (पेट्रोल) मध्ये मिसळणाऱ्या ethanol ला गंध देण्यासाठी Crotonaldehyde वापरु नये असे आदेश दिले आहे।**

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## काय बदलले?

**आधी काय होते:**
- Ethanol (शराब-जसा द्रव्य) गाडीच्या इंधनात मिसळायला परवानगी आहे
- या ethanol ला "गंध देणारे पदार्थ" (denaturant) मिसळावे लागत होते
- यामुळे कोणी ते पिऊ शकत नाही आणि बरबाद होते

**आता काय आहे:**
- Crotonaldehyde नावाचा रसायन denaturant म्हणून वापरु नये
- अन्य मंजूर केलेले पदार्थ वापरावेत
- सर्व excise अधिकारी आणि distillery मालकांना हे नियम पाळावेत लागेल

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## कोणांना परिणाम होतो?

✓ **Distillery / Rectified Spirit बनवणारे कारखाने**
✓ **Ethanol blending programme मध्ये काम करणारे**
✓ **State Excise अधिकारी**
✓ **जिल्हा Collector**

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## का असा आदेश?

**Crotonaldehyde हा रासायनिक पदार्थ:**
- कदाचित गंधीची प्रभावीता कमी होती
- किंवा आन्तरराष्ट्रीय नियमांमुळे बदल झाला
- किंवा बिगर परवानगीने दारूतून अलगीकरण (removal) शक्य होऊ शकते

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## अंमलबजावणी:

१. सर्व denaturant specification नवीन नियमानुसार बदलावेत
२. पुरानी साठे वापरण्याचे आदेश नाही
३. Distillery मालकांनी नव्या denaturant साथीच काम सुरू करावे
४. Deputy Commissioners आणि Superintendents यांनी परिस्थिति तपासून अहवाल द्यावा

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**महत्त्वाची बाब:** हा आदेश **पोटेबल (पीण्यायोग्य) दारूच्या दारूबंदीशी संबंधित नाही** — हा शुद्धतः **इंधन ethanol** साठीचा तांत्रिक बदल आहे।

Original Document

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