Liquid Hand Soap (500ml)

Material Composition Assumptions

A typical 500ml liquid hand soap bottle contains approximately 500 grams of formulated soap product plus 50 grams of packaging materials. The liquid formulation consists primarily of water, representing 60-70% of the total weight (300-350g), combined with fatty acids derived from vegetable oils or animal fats making up 15-20% (75-100g). The saponification process requires sodium hydroxide, while synthetic surfactants like sodium lauryl sulfate provide cleansing properties alongside glycerin for moisturizing effects.

The packaging system includes a polyethylene terephthalate bottle weighing approximately 40 grams and a polypropylene pump dispenser adding another 10 grams. Petroleum-derived preservatives and synthetic fragrances comprise the remaining small percentage of the formulation, ensuring product stability and consumer appeal throughout the intended shelf life.

Manufacturing Geography

The majority of liquid hand soap production occurs in China and Southeast Asian countries, where large-scale chemical manufacturing facilities benefit from established supply chains for both raw materials and packaging components. These regions offer proximity to palm oil and coconut oil sources while maintaining cost-effective production capabilities for plastic bottle manufacturing.

The carbon intensity of manufacturing in these regions reflects the predominant use of coal-fired electricity generation, with China’s national grid averaging 555 gCO2/kWh. This high grid intensity significantly impacts the energy-intensive saponification and mixing processes required for liquid soap formulation, as well as the injection molding operations needed for plastic bottle production.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
China	555 gCO2/kWh	62	Baseline
European Union	275 gCO2/kWh	48	-23%
North America	385 gCO2/kWh	54	-13%
India	650 gCO2/kWh	68	+10%
Southeast Asia	480 gCO2/kWh	58	-6%

Provenance Override Guidance

1. Manufacturing facility energy consumption data with breakdown of electricity usage for saponification, mixing, and bottling processes, including any renewable energy procurement agreements or on-site generation.

2. Detailed bill of materials specifying the exact sources and quantities of fatty acids, surfactants, and other chemical ingredients, with supplier-specific carbon intensity data for key raw materials.

3. Packaging specifications including plastic resin grades, bottle wall thickness, and manufacturing location for both primary containers and dispensing components, with material supplier carbon footprint data.

4. Transportation documentation covering shipping distances and methods from raw material suppliers to manufacturing facilities, and from production sites to primary distribution centers.

5. Waste and water treatment systems data showing energy consumption and disposal methods for manufacturing byproducts, including any circular economy initiatives for packaging materials.

Methodology Notes

• The CCI score represents cradle-to-gate emissions through manufacturing and packaging, excluding consumer use phase and end-of-life disposal impacts.
• Scope 1 emissions primarily reflect fuel combustion for heating during the saponification process and facility operations.
• Scope 2 emissions account for purchased electricity used in manufacturing equipment, mixing operations, and plastic bottle production.
• Scope 3 emissions dominate due to upstream raw material extraction, particularly for vegetable oils and plastic resins, plus packaging production.
• The functional unit assumes a standard 500ml bottle containing typical liquid soap formulation with pump dispenser.
• Transportation beyond primary distribution centers and consumer behavior variations are excluded from the baseline assessment.
• Data gaps exist around specific surfactant production methods and regional variations in raw material processing efficiency.